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FILE - In this April 24, 2019, file photo, Democratic presidential candidate Sen. Bernie Sanders, I-Vt., answers questions during a presidential forum held by She The People on the Texas State University campus in Houston. Sanders has a new foil for the 2020 Democratic presidential primary: former Vice President Joe Biden. Biden has been a declared candidate for fewer than three weeks and already Sanders has emerged as one of his most ardent critics.(AP Photo/Michael Wyke, File)

President Donald Trump reaches out to greet supporters after arriving at Chennault International Airport, Tuesday, May 14, 2019, in Lake Charles, La. (AP Photo/Evan Vucci)

FILE - In this Saturday, March 23, 2019 file photo, Worshippers prepare to enter the Al Noor mosque following last week's mass shooting in Christchurch, New Zealand. The death toll from the Christchurch mosque attacks has risen to 51 after a Turkish man who had been hospitalized since a gunman opened fire on worshippers seven weeks ago died overnight, authorities in New Zealand and Turkey confirmed, Friday, May 3, 2019. (AP Photo/Mark Baker, File)

File - In this Wednesday, April 3, 2019 file photo, Israel Electric Corporation employee works next to election campaign billboards showing Israeli Prime Minister and head of the Likud party Benjamin Netanyahu, left, alongside the Blue and White party leaders, from left to right, Moshe Yaalon, Benny Gantz, Yair Lapid, in Tel Aviv. The long-serving Prime Minister Netanyahu is the favorite to win Israel's general election on April 9, but he faces serious corruption charges and a stiff challenge from a former military chief Gantz who has positioned himself as the country's savior. (AP Photo/Oded Balilty, File)

FILE - This April 26, 2017 file photo shows the Twitter app icon on a mobile phone in Philadelphia. Twitter said Thursday April 4, 2019, it has stopped blocking French government ads calling on people to vote after it came under fire from authorities for being overzealous in applying a law aimed at banning fake news. (AP Photo/Matt Rourke, File)

A billboard from a campaign of the Hungarian government showing EU Commission President Jean-Claude Juncker and Hungarian-American financier George Soros with the caption "You, too, have a right to know what Brussels is preparing to do." is displayed at a street in Budapest, Hungary, Feb. 26, 2019. The Hungarian government claims that EU leaders like Juncker, backed by Soros, want to bring mass migration into Europe. The billboard has been sprayed with graffiti saying "Orban thief," in reference to Hungarian Prime Minister Viktor Orban. (AP Photo/Pablo Gorondi)

2020 Democratic presidential candidate Sen. Cory Booker speaks at a town hall in Charleston, S.C, on Saturday, March 2, 2019. (AP Photo/Meg Kinnard)

Michael Cohen, President Donald Trump's former personal lawyer, becomes emotional as he finishes a day of testimony to the House Oversight and Reform Committee, on Capitol Hill in Washington, Wednesday, Feb. 27, 2019. (AP Photo/J. Scott Applewhite)

Michael Cohen, President Donald Trump's former personal lawyer, is sworn in to testify before the House Oversight and Reform Committee on Capitol Hill in Washington, Wednesday, Feb. 27, 2019. (AP Photo/J. Scott Applewhite)