There's a first time for everything.

The Senate Intelligence Committee, led by Republicans, has subpoenaed Donald Trump Jr. to answer questions about his previous testimony before Senate investigators concerning Special Counsel Robert Mueller's investigation into 2016 Russian election interference, sources told Axios. It's the first known subpoena of one of President Trump's children.

Axios also notes the decision is significant because it pits a Republican committee chair against a member of a Republican president's family.

That fact has the Trump administration a little confused.

Regardless, the decision shows that the Congressional investigation into Russian election interference is not over, despite Mueller completing his task.

Trump Jr. previously testified before the Senate Judiciary Committee in 2017, saying he was only "peripherally aware" of the Trump Organization's proposed Trump Tower project in Moscow during his father's presidential campaign. Trump's former lawyer, Michael Cohen, challenged that claim in his own testimony before the House Oversight Committee in February. Tim O'Donnell

President Trump's re-election campaign is cutting ties with three of its pollsters, several news organizations reported Sunday, the apparent cause being leaked internal poll numbers that showed Trump losing to former Vice President Joe Biden in 15 of the 17 states polled. Those poll numbers have been trickling out for two months, and ABC News and NBC News obtained the full top-line results over the weekend. "While the campaign tested other Democratic presidential candidates against Trump," NBC News reports, "Biden polled the best of the group."

The numbers do look very bad, but Trump campaign manager Brad Parscale called them "ancient" and outdated, repeating Trump's claim that newer polls show him winning everywhere — at least against "defined" Democrats, meaning the pollsters gave respondents their own political descriptions of the Democrats' policies. Trump, who reportedly ordered aides to bury the terrible numbers, told ABC News "those polls don't exist."

The Trump campaign is retaining Tony Fabrizio — the pollster who conducted the leaked March 15-28 poll, and also calls the leaked numbers misleading — and John McLaughlin, Politico reports, and it is getting rid of Brett Lloyd, Mike Baselice, and Adam Geller.

Lloyd heads up the Polling Company, "a firm started by Kellyanne Conway in 1995," Politico notes. "Conway is now a senior White House adviser to Trump and is no longer formally connected to the company." Geller is founder and CEO of National Research Inc. and Baselice founded Baselice & Associates. "There is widespread speculation within the re-election campaign that Geller and Baselice, who still enjoy the confidence of top Trump aides, will join the pro-Trump super PAC," Politico adds. Peter Weber

Do you love President Trump and contested land? Consider a move to Trump Heights.

On Sunday, Israeli Prime Minister Benjamin Netanyahu and his cabinet met in the disputed Golan Heights to dedicate a small settlement, previously known as Bruchim, to Trump. Now called Ramat Trump, or "Trump Heights," the president can't say it's the biggest, most beautiful settlement — only 10 people live there and it's surrounded by land mines — but it does now have a giant sign, trimmed in gold and flanked by U.S. and Israeli flags. The Syrian border is 12 miles away, while the closest Israeli settlement, Kiryat Shmona, is 30 minutes away.

Netanyahu moved fast; it was only in April that he announced he was renaming the outpost in honor of Trump, to thank him for reversing U.S. policy toward the region. Israel captured the Golan Heights from Syria during the 1967 Six-Day War, and annexed the territory in 1981, a move most governments consider illegal under international law. During Netanyahu's visit to Washington in March, Trump signed an executive order acknowledging the area, home to about 50,000 people, as Israeli territory. Israel said it hopes the name change will encourage more people to move to Ramat Trump. Catherine Garcia

Argentine President Mauricio Macri on Sunday vowed to fully investigate the massive electrical failure that plunged Argentina and Uruguay into darkness.

Both countries share an electrical grid, and when the electricity was cut off, tens of millions of people were without power. Parts of Chile and Paraguay were also affected. The lights went out on Sunday morning, and by Sunday evening, officials said more than 80 percent of customers in Argentina and 88 percent in Uruguay had power again.

Gustavo Lopetegui, Argentina's energy minister, said the electrical system is "robust," and while "we're not ruling out any possibility ... we don't think it is down to a cyber attack." Argentine media reports that officials are linking the outage to a failure in the transmission of electricity from a hydroelectric dam, BBC News reports. Catherine Garcia

Gary Woodland won the U.S. Open Sunday in Pebble Beach, California, his first major championship.

He was able to defeat Brooks Koepka, the two-time defending champ. Woodland, 35, was in the lead most of Sunday, and shot 2-under-par 69 to finish at 13 under. He started the week ranked No. 25 in the world, with three PGA Tour titles under his belt. Koepka is ranked No. 1 in the world, and was hoping to become the second person to win the U.S. Open three years in a row. Catherine Garcia

Sara Netanyahu, the wife of Israeli Prime Minister Benjamin Netanyahu, admitted to misusing state funds, and on Sunday was ordered to pay a $15,000 fine.

Netanyahu took a plea deal, with the charges reduced from fraud to intentionally exploiting another person's error. She will have a criminal record. Her lawyer, Yossi Cohen, claims that his client is innocent, and this was an attempt to bring down her husband.

The case was in court for four years, with Netanyahu accused of spending $100,000 on catering between 2010 and 2013, despite having her own personal chef provided by the state, The Guardian reports. Benjamin Netanyahu is also the focus of several corruption investigations, and Israel's attorney general announced earlier this year that he plans on indicting him. Catherine Garcia

In recent weeks, a record number of African migrants have been crossing the U.S.-Mexico border, fleeing from political persecution and economic hardship.

During one week, Border Patrol agents in Texas' Del Rio sector stopped more than 500 African migrants; only 211 African migrants were detained along the entire southern border during the 2018 fiscal year, The Associated Press reports. Most of the migrants are from the Republic of the Congo, Democratic Republic of the Congo, Angola, and Cameroon. They fly to South America from Africa, then travel by land to the U.S.-Mexico border, with many seeking asylum at ports of entry.

Migrants from Cameroon have said they fly to Ecuador because there is no visa requirement, and it takes about four months to get from there to Tijuana. While in Panama, they are often robbed, AP reports, and held in camps run by the government.

Over the last several days, 170 asylum seekers were bused to Portland, Maine, where Somali refugees were resettled in the 1990s. Hundreds more are expected to arrive in the near future. Catherine Garcia