Furiously battling for Florida's older voters, Democratic presidential candidate Joe Biden has returned to the state, telling a crowd of seniors President Donald Trump views them as "expendable" and "forgettable".
Biden's Tuesday visit to the battleground state came a day after Trump made his own trip to Florida - his first outside Washington since his COVID-19 diagnosis.
Speaking to about 50 people at a community center in Broward County, Biden said Trump had recklessly dismissed the threat the virus had posed to their at-risk population.
"To Donald Trump, you're expendable. You're forgettable. You're virtually nobody. That's how he sees seniors. That's how he sees you," Biden said.
Trump has touted his management of the coronavirus pandemic.
A Biden win over Trump in Florida would seriously jeopardise the president's chances for re-election and most recent opinion polls show the Democrat ahead with key demographic groups in the state, particularly seniors.
Trump won Florida in 2016 by 1.2 percentage points.
Early voting ahead of Election Day on November 3 is breaking records across the United States.
More than 11.8 million ballots have been cast so far, including more than 1.6 million in Florida, according to the Elections Project at the University of Florida.
Biden, 77, has accused Trump, 74, of wanting to gut the Social Security benefit program for retirees, an allegation Trump's campaign denied again on Tuesday, saying Biden was trying "to scare seniors for political reasons".
Trump will travel later on Tuesday to Johnstown, Pennsylvania, for an airport rally in a state he carried in 2016 by less than 1 percentage point, helping propel him to the White House.
A Reuters/Ipsos poll released on Monday showed Biden with a 7-percentage-point lead in Pennsylvania, with a majority of voters saying he would do a better job of handling the pandemic.
After Tuesday, Trump plans rallies in Iowa, North Carolina, Georgia and Florida later this week as he barnstorms through crucial states.
The president returned to the campaign trail on Monday night in Florida for the first time since disclosing he had the coronavirus, throwing out protective masks to supporters but not wearing one himself.
"I went through it now. They say I'm immune. I feel so powerful," Trump told the crowd, who stood shoulder to shoulder, with most not wearing face coverings.
"I will kiss everyone in that audience, I will kiss the guys and the beautiful women, I will give you a big fat kiss."
The rally came hours after the White House said Trump had tested negative for COVID-19 on consecutive days and was not infectious to others.