WASHINGTON, Nov 3 (Reuters) - U.S. congressional candidates hammered into the campaign homestretch on Saturday, with Democratic former Vice President Joe Biden urging voters to reject division as President Donald Trump touted economic growth after sounding dire warnings on immigration.

Control of both houses of the U.S. Congress, currently dominated by Republicans, and 36 governors’ offices will be at stake when Americans vote in Tuesday’s elections. Interest has been unusually high for a non-presidential election year, with early voting running well ahead of past cycles.

Opinion polls and nonpartisan forecasters generally show Democrats with a strong chance of taking the 23 additional seats they would need for a majority in the House of Representatives, which they could use to launch investigations into Trump’s administration and block his legislative agenda.

Republicans are favored to retain control of the Senate, whose powers include confirming Trump’s nominations to lifetime seats on the Supreme Court.

Trump was due to campaign with Senate candidates in Montana and Florida, on the fourth day of an 11-rally tour largely focused on states he carried in 2016, where Republican challengers are trying to unseat Democratic incumbents.

“Heading to Montana and Florida today! Everyone is excited about the Jobs Numbers - 250,000 new jobs in October. Also, wages rising. Wow!” Trump said on Twitter early Saturday.

The Labor Department on Friday reported sharply better-than-expected job creation in October, with the unemployment rate steady at a 49-year low of 3.7 percent and wages notching their best annual gain in almost a decade.

Republicans in many competitive suburban districts have tried to focus their campaign messages on the robust economic growth, though in his campaign appearances Trump has also focused on his hard-line immigration stance as he looks to stem the illegal and legal flow of people into the United States.

Biden campaigned in Ohio on Saturday in support of Democrats U.S. Senator Sherrod Brown and gubernatorial candidate Richard Cordray.

“We’re in a battle for America’s soul,” Biden, his voice faint and scratchy, told a crowd at a high school south of Cleveland. “We Democrats have to make it clear who we are. We choose hope over fear, we chose unity over division, we choose our allies over our enemies and we choose truth over lies.”

Congressional candidates campaigned in a whirlwind close across the country: in Virginia, Democrat Jennifer Wexton greeted voters in the Manassas Veterans Day parade; in New Jersey Republican Jay Webber met them in a diner, and in Minnesota Republican Pete Stauber went door to door urging people to vote.

EARLY VOTING UP SHARPLY

As of Friday night, almost 32.4 million people had cast ballots early, according to The Election Project at the University of Florida, which tracks turnout. That is up more than 50 percent from the 20.5 million early votes cast in all of 2014, the last federal election when the White House was not at stake.

Trump on Friday appeared in West Virginia with Patrick Morrisey, who is seeking to unseat Democratic Senator Joe Manchin. That marked his third campaign appearance in that state.

His Saturday visit to Belgrade, Montana, to pump up the campaign of Matt Rosendale, the Republican state auditor challenging Democratic U.S. Senator Jon Tester, will be his fourth to Montana.

Some analysts said the president’s repeated visits to states that he won in 2016 were a signal Republicans were worried about keeping control of Congress.

“It’s not a good sign for Republicans if they have to spend all these resources for a seat they shouldn’t have to be fighting for,” said Simon Haeder, a professor of political science at West Virginia University, in a phone interview. “That should be a solid Republican seat.”

In Florida, Trump is due to campaign for Governor Rick Scott, who is trying to unseat Democratic U.S. Senator Bill Nelson, and U.S. Representative Ron DeSantis, who is running for governor against Democratic Tallahassee Mayor Andrew Gillum.

(Reporting by Scott Malone, additional reporting by Sharon Bernstein in Sacramento, California Editing by James Dalgleish)