The president was responding to chants of "Fire Fauci" at a Florida rally.
President Donald Trump and former Vice President Joe Biden are racing toward Election Day with Biden in Pennsylvania and Trump Michigan, Iowa, North Carolina, Georgia and Florida on Sunday.
Vice President Mike Pence is in North Carolina and Sen. Kamala Harris, D-Calif., is in Georgia and North Carolina.
In the season's final ABC News/Washington Post polls, the pandemic versus the economy defines the presidential contest in two key battlegrounds, with Florida holding firm to its toss-up status while Biden leads slightly in Pennsylvania.
There's little change in either state. In Florida, Donald Trump has 50% support among likely voters to Biden's 48%; it was 51%-47% in an ABC/Post poll Sept. 20. Trump won the state by 112,911 votes out of more than 9.4 million cast in 2016.
In Pennsylvania, the race stands at 51%-44%, Biden-Trump, a 7-point advantage for the Democrat; that compares with a 9-point margin late last month. Here, Trump's 2016 win was even narrower: 44,292 votes out of nearly 6.2 million cast.
Republican strategist and ABC News Contributor Sara Fagen said on "This Week" that North Carolina is now the epicenter of the 2020 election.
"It's also probably the epicenter of the Senate," she said, "who's going to control the Senate."
Just days ahead of Nov. 3, the FiveThirtyEight presidential election forecast has Biden with a 90 in 100 chance of winning the Electoral College.
At this point, Trump needs a big polling error in his favor if he's going to win. Although the error doesn’t need to be as big as you might think if you were just looking at national polls.
Editor-in-chief Nate Silver breaks down the forecast:
The Biden campaign announced plans for Biden to address the nation on election night from his hometown of Wilmington, Delaware.
Biden, Harris and their spouses will all spend the night there.
-ABC News' Molly Nagle
Trump on Sunday kicks off two back-to-back five-rally days, bounding across the country to hold packed events in hopes of boosting turnout in the final days leading to Election Day, just like he did in 2016.
The president is set to hold his last rally before Election Day in Grand Rapids, Michigan, the same city where he wrapped up his 2016 campaign four years ago.
But some of the other stops on the president's final campaign push have changed since his initial run.
Unlike 2016, in 2020 Trump is not campaigning in the final 48 hours in New Hampshire, Minnesota, or Virginia — all states he ended up losing. In fact, the president has no rallies scheduled in the final two days in any pickup states, as Trump remains on defense with time running out.
For his re-election, Trump is zeroing in on Midwestern states, especially Michigan -- holding three rallies in the state over the next two days. Trump is also traveling to Iowa, a state he won by nine points, and Georgia where he won by over five points.
-ABC News' Will Steakin
