Donald Trump is "healthy enough to be president," according to Dr. Mehmet Oz, whose only apparent issue with the Republican nominee was that he could afford to lose a few pounds (and in our unprofessional medical opinion, find a new form of exercise). And despite the fact that Trump would be the oldest person ever elected president, the Republican nominee assured the world famous heart surgeon that he is as sprightly as ever.

"When you look in to the mirror, how old is the person you're looking at?" Dr. Oz asked during an interview for his show, which aired Thursday and was taped the day before.

"I would say I see a person who is 35 years old," Trump replied. In the background, there came a giggle from the audience. "No, I mean, I feel the same," Trump said in his defense.

Trump added that when he plays golf with professional NFL quarterback Tom Brady, "I feel the same age as him. It's crazy." (For the record, Brady is actually 39).

Dr. Oz also read out the results of Trump's testosterone levels on the show. "Your testosterone is 441 — which is, actually … is good," Oz explained, only for the audience to greet the number with uproarious applause.

Still, some pointed out the curiosity of sharing such a detail, with The Boston Globe's Matt Viser tweeting that "John McCain released 1,200 pages of medical records. No coverage of his testosterone level. Donald Trump released [one] page. With testosterone." ABC's Candice Smith tweeted that Dr. Richard Besser, who advised on Trump's medical letter, said "measuring testosterone is not a routine blood test."

While the letter from Trump's doctor also covered his blood pressure, cholesterol levels, and other such measurements, his hand size was noticeably absent. Jeva Lange

South Korean fighter jets fired warning shots on Tuesday morning when a Russian military aircraft twice violated the country's airspace, the South Korean Joint Chiefs of Staff said.

The Russian aircraft flew over an island off South Korea's eastern coast at 9:09 a.m. and 9:33 a.m. local time, each time for a few minutes, CNN reports. The Ministry of Defense said this was the first time Russia has ever violated South Korean airspace, and the shots were fired using a 20mm weapon. This all took place over Dokdo, islands that South Korea controls but have been claimed by Japan.

Earlier in the morning, two Chinese military aircraft entered South Korea's Air Defense Identification Zone, and were later joined by two Russian planes. It remains unclear if the jets purposely entered the airspace. Catherine Garcia

The skills he learned as a firefighter emergency medical technician in the U.S. Air Force often come in handy as James Golia volunteers with the Sea Lions for Service Members program.

Golia served in the Air Force for 20 years, and lost track of how many times he was deployed to places like Afghanistan and Saudi Arabia. Now retired, Golia was diagnosed with post traumatic stress disorder, and a military friend recommended he volunteer with the Pacific Marine Mammal Center's Sea Lions for Service Members program. The facility is in Laguna Beach, California, and rescues injured marine mammals, who are then rehabilitated and released back into the ocean.

Volunteers do everything from feed the sea lions to clean out their pens. Golia originally planned on only helping out one day, but immediately fell in love with the work, and now volunteers once a week. The program's organizers say the veterans are able to empathize with the injured animals, and it encourages them, showing what can be done via rehabilitation. Golia told NBC Los Angeles he considers the time he spends at the center his therapy, and it has made him a different person. "Sometimes in life, a person should feel compelled to give back, and I'm doing just that," he said. Catherine Garcia

Former Special Counsel Robert Mueller won't testify before two House committees until Wednesday morning, but the pregame show has already started on cable news. CNN's Anderson Cooper deconstructed President Trump's lies about Mueller and then had a panel of experts, including former White House counsel and Watergate star witness John Dean, preview Mueller's testimony. Dean argued that if Mueller had been the Watergate prosecutor, Richard Nixon would have gotten away with his alleged crimes.

On MSNBC, Ari Melber pointed to reports that Attorney General William Barr "is stepping in again" and trying to limit what Mueller says. And Mueller will not be "standing with the president's critics," he added. "Remember, as a legal matter, when Mueller steps in front of the world Wednesday, he will be a hostile witness under subpoena. He is prepping to be pressed and to push back."

"There are damning facts in the Mueller report, but some Democrats want more than a dry, factual presentation," Melber said. "They want to press Bob Mueller under oath to say in English what the Mueller report only said in lawyer jargon: That there is substantial evidence against Trump, that it comes from his own staff, and that it suggests he committed multiple crimes in office."

Former Solicitor General Neal Katyal told Melber he's "extremely concerned" about the reports Barr is, in his analysis, "trying to gag Mueller and trying to say that anything that's not in the report is 'presumptively privileged.' And you know, Mueller is so by-the-book, I suspect that will influence him greatly, what Barr and others are trying to say in terms of squelching him." At the same time, Mueller's "by-the-book" nature could also work against Trump, Katyal suggested, because "the book's actually changed" since Mueller turned in his report, specifically because Barr has since said he could have reached a conclusion about whether Trump has committed crimes.

Whether Mueller would have said Trump committed crimes is "exactly the kind of question the Democrats should be leading the hearing with," Katyal said. Melber said Katyal was engaging in "a little bit of wishful thinking," but Katyal said given Barr's comments, Mueller "absolutely should go further" than what's in his report, "and indeed I don't see how he can't answer that question." Peter Weber

Whenever there's a big scandal unfolding, President Trump works to distract everyone, causing a commotion so no one can remember the original impropriety, Seth Meyers said on Monday's Late Night.

That's likely one reason why he can't stop talking and tweeting about "The Squad," the four Democratic congresswomen of color he's been attacking for more than a week now. Over the weekend and on Monday, Trump said the lawmakers are not capable of "loving" the United States, and called them, among other things, "racist" and "not very smart." So, why the big distraction? It involves Special Counsel Robert Mueller, Meyers said.

Mueller is scheduled to testify in front of two congressional committees on Wednesday, answering questions about his investigation into Russian meddling in the 2016 presidential election and obstruction of justice. (Trump scheduled his North Carolina rally last week on the day Mueller was originally set to testify.) Mueller will most likely be asked about the Justice Department memo that states a president cannot be indicted while sitting in office, and whether Trump would have been indicted had it not been for those guidelines — something Meyers finds bonkers. "That's right, Trump can't be indicted because of a memo written in 1973," he said. "People ignore memos every day. We sent out 15 memos, yet Devon is still microwaving fish in the break room."

On top of the Mueller testimony, court documents unsealed last week in Michael Cohen's case show the president knew Cohen was making hush payments to adult film star Stormy Daniels, who said she had an affair with Trump. That development "wasn't even in the Top 10 news stories last week," Meyers said. "This is how he wears us down. It's like being in a zombie movie — anybody can outrun one zombie, but when your city is crawling with zombies, you're like f--k it, just eat me." Watch the video below. Catherine Garcia

To President Trump, Stephen Miller is a senior policy adviser. To David Glosser, he's his "immigration hypocrite" of a nephew.

Last August, Glosser, a retired neuropsychologist, penned an essay about Miller, the architect of Trump's harsh immigration policies. Glosser wrote that their relatives came to the U.S. in the early 1900s from Europe, fleeing anti-Jewish violence, and he shuddered to think "of what would have become of the Glossers had the same policies Stephen so coolly espouses" been in effect.

His message didn't get through to Miller, Glosser said on Monday's Rachel Maddow Show, but he didn't think it would, as Miller's "entire career, his entire persona, is built on this particular issue." Glosser did hear from others whose families came to the U.S. under similar circumstances, he said, and seeing Americans speaking out against the Trump administration's treatment of immigrants shows that "people care, as it turns out."

The political reasoning behind Trump's cruel policies is simple, Glosser said. The Republican Party and demographers found that in a few decades, the U.S. will go from being a "white majority country to being a white plurality country. As it turns out, the people who are not predominately of European background are less likely to vote for Republicans than for Democrats. This makes it problematic for them if they anticipate remaining in positions of power in order to advance their particular agenda." Because of this, he said, it's "not worthwhile for them to allow people into the country or to allow people to gain citizenship who may not be members of their party in the future."

Glosser said he finds it "repugnant" that the Trump administration assumes a majority of white Americans are racist, and thought the country had repudiated racism since George Wallace's 1968 presidential run. "Now we see Mr. Trump and his minions have legitimized race hatred as a means of sustaining and gaining political power and influence," he said. Catherine Garcia

Since June 7, migrant flow through Mexico has dropped by 36.2 percent, the country's foreign minister told reporters on Monday.

Marcelo Ebrard credits the Mexican government's decision to deploy 20,000 members of a new militarized police force to the country's southern border. The plan went into action after President Trump threatened Mexico with tariffs if it didn't slow down the flow of migrants making their way to the U.S. border.

The National Immigration Institute states that during the week of June 1 to 7, an average of 4,156 migrants entered Mexico daily through its southern border. Two weeks later, this number declined to 2,652 people per day, The Guardian reports. After making their deal in June, the U.S. and Mexico agreed to reconvene after 45 days to come up with new target numbers, but until then, "we're going to keep up this effort so the trend continues downward," Ebrard said. Catherine Garcia