Political organizations

President Donald Trump pauses while speaking about the coronavirus in the James Brady Press Briefing Room of the White House, Thursday, April 23, 2020, in Washington. (AP Photo/Alex Brandon)

FILE - In this Dec. 9, 2019, file photo, former first lady Michelle Obama listens to female students at the Can Giuoc high school in Long An province, Vietnam. Seeking to unite Democrats, Joe Biden has raced to line up supporters ranging from progressive icon Bernie Sanders to former President Barack Obama, whose administration sometimes irked liberals. But the person with the most influence may be Michelle Obama. (AP Photo/Hau Dinh, File)

Voters observe social distancing guidelines as they wait in line to cast ballots at Washington High School while ignoring a stay-at-home order over the coronavirus threat to vote in the state's presidential primary election, Tuesday, April 7, 2020, in Milwaukee. (AP Photo/Morry Gash)

House Speaker Nancy Pelosi of Calif., speaks with reporters alongside Senate Minority Leader Sen. Chuck Schumer of N.Y. after the Senate approved a nearly $500 billion coronavirus aid bill, Tuesday, April 21, 2020, on Capitol Hill in Washington. (AP Photo/Patrick Semansky)

Election officials Britt Bermingham, left, and Terry ?Perry count ballots as City of Milwaukee Election Commission workers were processing absentee ballots on the fourth floor of an office building at 501 W. Michigan Ave. in Milwaukee on Monday, April 13, 2020.(Mike DeSisti/Milwaukee Journal-Sentinel via AP)

Treasury Secretary Steven Mnuchin and President Donald Trump listen to a question during a conference call with banks on efforts to help small businesses during the coronavirus pandemic, at the White House, Tuesday, April 7, 2020, in Washington. (AP Photo/Evan Vucci)

Isaac Repinski, of Milwaukee, juggles after voting at Riverside High School in Milwaukee on Tuesday, April 7, 2020. The Wisconsin primary is moving forward in the wake of the coronavirus epidemic after Gov. Tony Evers sought to shut down Tuesday's election in a historic move Monday that was swiftly rejected by the conservative majority of the Wisconsin Supreme Court by the end of the day. (Mike De Sisti/ Milwaukee Journal Sentinel via AP)

People line up to vote at Riverside High School during the primary in Milwaukee on Tuesday, April 7, 2020. Voters lined up to cast ballots across Wisconsin on Tuesday, ignoring a stay-at-home order in the midst of the coronavirus pandemic to participate in the state's presidential primary election. (Mike De Sisti/Milwaukee Journal-Sentinel via AP)

FILE - In this July 26, 2016, file photo the stage is reflected on a glass window on the suite level at Wells Fargo Arena as Timmy Kelly sings the national anthem before the start of the second day session of the Democratic National Convention in Philadelphia. The coronavirus pandemic is forcing Democrats and Republicans to take a close look at whether they'll be able to move forward as planned this summer with conventions that typically kick off the general election season. (AP Photo/John Locher, File)

FILE - This March 16, 2020, file photo shows the Oculus at the World Trade Center's transportation hub in New York. Census Day, the April 1 reference day for the once-a-decade effort to count everyone in the U.S., arrived Wednesday with a nation almost paralyzed by the spread of the novel coronavirus, but census officials vowed the job would be completed by its year-end deadline. (AP Photo/Mark Lennihan, File)