US President Joe Biden rallies Democrats in Florida Tuesday as he makes his closing pitch for next week's midterm elections that set the balance of power in Congress and state capitols.

As he faces signs of a growing "red wave" that could sweep the opposition Republicans to power in the House and Senate, Biden has been attempting with mixed success to court the blue-collar vote.

He travels to Hallandale Beach, a coastal city 20 miles (30 kilometers) north of Miami to tout his administration's progress on health care and seniors' entitlement reform.

"Millions of Americans would lose health care coverage, benefits and protections under congressional Republicans' plans," the White House said in a statement that hailed Biden-backed legislation to curb soaring prescription drug costs.

The 79-year-old Democrat had been promising since a trip was canceled by a hurricane to go to Florida, a traditional "swing state" that has leaned more solidly into the conservative column in recent cycles.

In addition to a formal speech on health care, Biden will don his Democratic leadership hat for fundraising events for his party's gubernatorial and Senate candidates, who are both expected to lose.

The White House hopes the visit will nevertheless help in portraying the Republican Party as a threat to middle class households and seniors.

Political scientist Aubrey Jewett said the Republicans had done a good job of convincing much of the Hispanic community -- which makes up more than a quarter of the state's 22 million population -- to switch allegiance.

Former president Donald Trump and Governor Ron DeSantis, his one-time protege turned rival, have shrewdly played on Hispanics' fear of communism, the University of Central Florida professor told AFP.

Campaign pivots

"That got a certain percentage of Hispanics who thought, 'We didn't come to this country and flee Cuba or South America to come here and get the same thing.'"

Susan MacManus, a professor of political science at the University of South Florida, believes Republicans are simply better than Democrats at keeping up with the Sunshine State's ever-shifting demographic landscape.

"A lot of younger people with families moved here because they did not agree with (pandemic) lockdown for the children... They probably didn't come here as Republicans, the younger ones with kids," she told AFP.

"But the policies on schools are such that when they got here, they probably lean more Republican than Democrat because of their kids in the schools."

Biden has been relatively quiet during the campaign for the midterms, which are expected to hand the House of Representatives back to the Republicans, who would also take the evenly-divided Senate with just one pick-up.

Reproductive rights once appeared to be the issue that would decide the election. Voter registrations, particularly among women, surged after the US Supreme Court ended federal protections for abortion access in June.

But it has lost salience as a campaign issue, sparking concern among Democrats that they may have relied too heavily on the subject to the detriment of "kitchen table" fare like inflation and crime.

The party has tried to pivot in the closing weeks of the campaign, but soaring consumer prices -- up 8.2 percent in a year -- have undermined Biden's attempt to sell himself as the president for the American worker.

The Democrats have called on former president Barack Obama, still the party's biggest draw, to mobilize the troops.

The pair are scheduled to appear together Saturday for a rally in Pennsylvania, one of the most hotly contested states in this cycle.