Political fundraising

This video framegrab image from MSNBC's Morning Joe, shows Democratic presidential candidate former Vice President Joe Biden speaking to co-host Mika Brzezinski, Friday, May 1, 2020. (MSNBC's Morning Joe via AP)

FILE - In this March 10, 2020, file photo Democratic presidential candidate former Vice President Joe Biden speaks to members of the press at the National Constitution Center in Philadelphia. (AP Photo/Matt Rourke, File)

Undated family handout photo of Tom Moore, a 99-year-old British veteran who has started a campaign to thank the National Health Service by walking lengths in his garden. Captain Tom Moore’s family had set up a fund-raising drive to support health workers caring for coronavirus patients, as a way to thank doctors and nurses who treated him for a broken hip. The family thought they would struggle to reach their initial 1,000-pound target last week. But the campaign clearly captured the public mood at a time of national crisis and within days, the cause had attracted more than 250,000 supporters who pledged more than 6 million pounds. (Moore Family via AP)

FILE - In this Jan. 4, 2017 file photo, Vice President Joe Biden, left, watches President Barack Obama, center, at Conmy Hall, Joint Base Myer-Henderson Hall, Va. (AP Photo/Susan Walsh)

FILE - In this March 12, 2020, file photo, Democratic presidential candidate former Vice President Joe Biden speaks in Wilmington, Del. Biden expects to name a vice presidential vetting committee next week. That's according to three Democrats with knowledge of the situation who spoke to The Associated Press on condition of anonymity to discuss internal plans. (AP Photo/Matt Rourke)

This image from video provided by the Bernie Sanders presidential campaign shows Sen. Bernie Sanders, I-Vt., as he announces he is ending his presidential campaign Wednesday, April 8, 2020, in Burlington, Vt. (Bernie Sanders for President via AP)

FILE - In this March 7, 2020, file photo Democratic presidential candidate former Vice President Joe Biden speaks during a campaign rally in Kansas City, Mo. White House contenders aren't typically bashful about asking for money. But as the coronavirus pandemic upends life, President Donald Trump and his likely Democratic rival, Biden, suddenly find themselves navigating perilous terrain. (AP Photo/Charlie Riedel, File)

In this image from video provided by BernieSanders.com, Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks from Washington, Tuesday, March 17, 2020. The coronavirus has disrupted American life, and the 2020 presidential campaign is no exception. Amid calls for social distancing to stop the pandemic’s spread, Democrats Joe Biden and Bernie Sanders, as well as Republican President Donald Trump, have had little choice but to call off large-scale public events in favor of politicking online and over the airwaves. (BernieSanders.com via AP)

Convicted ex-Rep. Duncan Hunter, left, walks towards a court building for sentencing Tuesday, March 17, 2020, in San Diego. Hunter faces up to five years in prison after pleading guilty on a corruption charge. Hunter served six terms representing one of Southern California's last solidly Republican districts before he resigned. (AP Photo/Gregory Bull)

Lally Doerrer, left, and neighbors Douglas and Marlene Groll, watch Joe Biden during his Illinois virtual town hall, in her living room Friday, March 13, 2020, in Chicago. (AP Photo/Charles Rex Arbogast)