Politically, Meghan McCain and Joe Biden have a lot to argue about. But emotionally, they're on the same page.

McCain, the daughter of Arizona Sen. John McCain (R), and the former Democratic vice president shared a heartwarming moment on The View on Wednesday as McCain emotionally discussed her father's cancer diagnosis. The senator was diagnosed with gliobastoma earlier this year — the same cancer that Biden's son, Beau, passed away from in 2015.

On the show, McCain tearfully told Biden how she thinks about Beau almost every day because of the shared diagnosis. Biden quickly walked over to McCain and grabbed her hand, describing how Beau looked up to her father and his courage, long before they were affected by the same illness.

Biden and the senator are longtime friends. "There is hope," Biden told McCain. "And if anybody can make it, your dad [can]." Watch the whole exchange below. Kathryn Krawczyk

Joe Biden kicked off his presidential campaign on Thursday as the clear frontrunner not only in the Democratic field but also the general election, according to Politico/Morning Consult polling. In a head-to-head contest with President Trump, Biden draws 42 percent to Trump's 34 percent, an 8-percentage point lead that puts Trump in a much worse position than former President Barack Obama when he was running for re-election in 2012. Morning Consult conducted the poll April 19-21 among 1992 registered voters; the poll has a ±2-point margin of error.

Biden is ahead of closest Democratic rival Sen. Bernie Sanders (I-Vt.), 30 percent to 24 percent, in Morning Consult's weekly tracking polls. Biden and Sanders are followed by South Bend Mayor Pete Buttigieg (9 percent), California Sen. Kamala Harris (8 percent), Massachusetts Sen. Elizabeth Warren (7 percent), and Beto O'Rourke (6 percent). The tracking poll covers April 15-21, is based on 14,336 interviews with Democratic primary voters, and has a margin of error of ±1 percentage point.

Biden's coalition is older, more racially diverse, and more moderate than Sanders voters, Morning Consult found. Biden just edges out Sanders in favorability ratings, though his net favorability dropped 5 points from January, a period in which he was accused of inappropriate handsiness. Peter Weber

Former Vice President Joe Biden announced in a video Thursday morning that he's making a third bid for president. Unlike in 1988 and 2008, though, he starts out as one of the frontrunners in a diverse field of 19 other Democrats. In a conference call with donors on Wednesday, Biden stressed the importance of notching strong fundraising numbers in the first 24 hours of his campaign, Politico reports. But in his launch video, Biden steered away from the prosaic, vowing to protect the core values and ideals that America stands for from President Trump, centering his pitch on Charlottesville, Virginia,

Biden, 76, starts out with strong name recognition, support from organized labor and other Democratic constituencies, and strong ties to former President Barack Obama, who is not endorsing anyone in the Democratic primary. He is expected to officially kick off his campaign at a Pittsburgh union hall on Monday. Peter Weber

"Like all of [President] Trump's closest relationships, his relationship with Twitter is sort of a love-hate situation," Trevor Noah said on Wednesday's Daily Show. And on Tuesday, Trump invited Twitter CEO Jack Dorsey to the Oval Office to complain. "That's right, my friends, the president of the United States is upset because he feels he should have more Twitter followers," Noah said. "This is absolutely ridiculous. Like, what's next? He's going to complain to Instagram because his thirst traps aren't blowing up?"

Trump flying in the CEO of Twitter to complain about losing followers will actually probably "inspire more people to run for office," Noah suggested. "People are going to be on stage, like, 'I'm running for president so that I can ask Jeff Bezos: What happened to my tube socks, which were supposed to be here by Wednesday?!'" He pitied "everyone in this meeting with Trump who had to sit there and take it seriously," including Dorsey, forced to "explain to a president that some of his followers were deleted because they were bots and spam accounts."

"Twitter is only one of the president's beefs right now," Noah said. He's also feuding with the media, House Democrats, and the Constitution, threatening to "head to the Supreme Court" if Democrats impeach him. "Just to be clear, that's not a thing," Noah said. "The Supreme Court can't overrule an impeachment. ... This would be like if a cop gives you a ticket and your response is: 'I'm fighting this, buddy — you'll be hearing from my orthodontist!'"

"So in the last 48 hours, the president has gotten in fights with Congress, the press, and Twitter," he said. "Look, we can't help him with the first two, but we do have someone who can help him out online." That would be Jaboukie Young-White, and you can watch him advise Trump to seem less thirsty on Twitter below. Peter Weber

President Trump made some promises during the 2016 campaign: He would release his tax returns, "build the wall," "drain the swamp," protect Medicare and Social Security, and champion law and order, to name a few.

Like all presidents, he has been pretty selective about which campaign promises merit follow-through. The "wall", for example, was worth shutting down the government and sparking a constitutional crisis; his tax returns were deemed worthy of going to court and threatening a constitutional showdown to keep hidden. One of the "promises" he has tried to keep, according to Special Counsel Robert Mueller's report, is "lock her up," his enduring campaign chant about 2016 rival Hillary Clinton.

Mueller's report "brimmed with examples of Mr. Trump seeking to protect himself from the investigation," The New York Times reports, but it also shows at least three instances of him "trying to wield the power of law enforcement to target a political rival, a step that no president since Richard M. Nixon is known to have taken." As with many potential crimes Mueller records, Trump's orders or suggestions to prosecute Clinton were apparently ignored or redirected by former Attorney General Jeff Sessions and former White House Counsel Don McGahn.

Still, Trump's attempt to target Clinton "reeks of a typical practice in authoritarian regimes where whoever attains power, they don't just take over power peacefully, but they punish and jail their opponents," political historian and professor Matthew Dallek tells the Times. It appears from Mueller's report that Trump, encouraged by his Fox News allies, didn't appreciate the difference between political self-preservation and weaponizing the law enforcement tools he seems to think work for him, adds Duke University law professor Samuel W. Buell. "All of his demands fit into a picture that he believes the apparatus is mine"

You can read the details of Trump's attempts to "lock her up" in Mueller's report and at The New York Times. Peter Weber

George Conway was, by all accounts, happy when his wife, Kellyanne Conway, helped campaign-manage President Trump into office. But that was so 2016. Since then, Conway has become one of Trump's loudest conservative critics, to the consternation of his wife, who is one of Trump's top White House aides and most ardent defenders in the media.

When Trump's 2016 rival, Hillary Clinton, wrote an op-ed in The Washington Post on Wednesday night, arguing that Vladimir Putin is trying to make Russia great again by attacking U.S. democracy and Congress needs to hold Trump accountable for aiding him, using Special Counsel Robert Mueller's newly released report as a road map, George Conway repurposed Clinton's 2016 slogan: "If she's with the Constitution, I'm with her. "

Ouch. Peter Weber

Soon after Katie Pollak adopted her dog Chipper seven years ago, she discovered that he wasn't obsessed with traditional toys, but rather with discarded plastic water bottles they would find while out on walks and hikes.

"He started picking them up immediately, so I encouraged it and rewarded it," Pollak told Today. "And he motivated me to do the same. I really started getting out and picking up more than I was before, so we created kind of a team."

Pollak and Chipper, now 8, live in Mesa, Arizona, and enjoy spending time outdoors. Pollak carries garbage bags with her every time they go hiking or paddleboarding, and together, they pick up recyclables, including cans and bottles, and trash, like old clothes and wrappers. They have filled countless bags, and often meet with friends to clean up spaces across Mesa. Chipper, Pollak said, "reminds me all the time to be my best self and do everything I can, and he's so much fun to do it with." Catherine Garcia