President Donald Trump speaks in the Rose Garden of the White House, Friday, May 29, 2020, in Washington, As White House trade adviser Peter Navarro, left, White House national security adviser Robert O'Brien, and White House chief economic adviser Larry Kudlow, far right, listen. (AP Photo/Alex Brandon)

President Donald Trump answers questions from reporters during an event on protecting seniors with diabetes in the Rose Garden White House, Tuesday, May 26, 2020, in Washington. (AP Photo/Evan Vucci)

Chet Harhut, deputy manager, of the Allegheny County Division of Elections, wheels a dolly loaded with mail-in ballots, at the division of elections offices in downtown Pittsburgh Wednesday, May 27, 2020. The once-delayed June 2, Pennsylvania primary will feature legislative and congressional races, a first run for some new paper-record voting systems and the inaugural use of newly legalized mail-in ballots. (AP Photo/Gene J. Puskar)

Administrator of the Centers for Medicare and Medicaid Services Seema Verma speaks at an event on protecting seniors with diabetes in the Rose Garden White House, Tuesday, May 26, 2020, in Washington. (AP Photo/Evan Vucci)

White House press secretary Kayleigh McEnany speaks with reporters about the coronavirus in the James Brady Briefing Room of the White House, Friday, May 22, 2020, in Washington. (AP Photo/Alex Brandon)

President Donald Trump speaks in the Rose Garden of the White House, Friday, May 29, 2020, in Washington. From left with Trump are, White House trade adviser Peter Navarro, White House national security adviser Robert O'Brien, Secretary of State Mike Pompeo, Treasury Secretary Steven Mnuchin, U.S. Trade Representative Robert Lighthizer and White House chief economic adviser Larry Kudlow. (AP Photo/Alex Brandon)

A voter drops off their mail-in ballot prior to the primary election, in Willow Grove, Pa., Wednesday, May 27, 2020. (AP Photo/Matt Rourke)

President Donald Trump speaks with reporters before boarding Air Force One as he departs Saturday, May 30, 2020, at Andrews Air Force Base, Md. Trump is en route to Kennedy Space Center for the SpaceX Falcon 9 Launch. (AP Photo/Alex Brandon)

A protester holds up an American flag as about a dozen people gather on the corner of Esplanade Ave. and N. Claiborne Ave., Friday, May 29, 2020, in New Orleans, La., to protest the death of George Floyd, a handcuffed black man who died in police custody after he pleaded for air as a white police officer kneeled on his neck in Minneapolis. (Max Becherer/The Times-Picayune/The New Orleans Advocate)