PEMBROKE PINES, Fla. — Fighting as an army of one, Donald Trump vowed Saturday to press into Democratic strongholds in the campaign's final days as Hillary Clinton looked to an army of A-list celebrities and politicos to defend her narrowing path to the presidency.

The divisive Republican outsider conceded he was largely on his own even as he promised to march into Minnesota, a state that hasn't backed a GOP presidential nominee in more than four decades.

“Hillary Clinton has all of these celebrities and failed politicians out campaigning for her,” a defiant Trump declared in North Carolina, one of four battleground states he was visiting Saturday. “I just have me, but I have my family.”

Responding to Trump's push, Clinton announced plans to devote valuable attention to Michigan, another unlikely battleground where she and President Barack Obama planned to campaign Monday. The Democratic nominee faced dark skies Saturday in Florida, fighting rain and wind in a key battleground state before a Pennsylvania appearance with pop singer Katy Perry. Clinton was preparing to campaign Sunday with basketball superstar LeBron James.

The final-days scramble highlighted sharp differences between the campaigns.

Backed by Obama and her party's political elite, Clinton spent much of the last year fighting to unify Obama's coalition of minorities and younger voters, aided at times by Trump's deep unpopularity among women in both parties.

Trump has courted working-class white voters on the strength of his celebrity, having scared off many would-be Republican allies during a campaign marred by extraordinary gaffes and self-created crises. Just four weeks ago, a 2005 video emerged in which a married Trump boasted of kissing women and grabbing their genitalia without their permission.

Even with the damaging video, Clinton faced extraordinary challenges of her own in recent days after the FBI confirmed plans to renew its focus on the former secretary of state's email practices. The development is seen as particularly threatening for Clinton in states like Michigan, Pennsylvania and New Hampshire that don't offer early voting.

At least 41 million Americans across 48 states have already cast ballots, according to an Associated Press analysis. That's significantly more votes four days before Election Day than voted early in the 2012.

House Speaker Paul Ryan campaigned Saturday alongside Trump's running mate, Mike Pence — a rare show of unity, but not with Trump himself. The speaker encouraged Republicans to “come home” to support Trump in Ryan's home-state Wisconsin, ignoring for a day his icy relationship with the GOP nominee.

Trump has frustrated party leaders in many ways, particularly by ignoring the hard work that fuels most successful modern-day campaigns. He has done little to collect data on prospective supporters, and he has been unwilling to invest in a major advertising campaign to keep pace with Clinton.

Clinton's campaign has spent more than $267 million in TV advertising through Election Day. Trump, who claims a net worth of roughly $10 billion, has invested $93 million, according to data collected by Kantar Media.

His campaign strategy has hinged on an aggressive schedule packed with massive rallies. The path of his luxury campaign jet has been fueled by somewhat risky ambition at times, however. Rather than hunkering down in must-win Florida this weekend, Trump flew Saturday to Democratic-leaning territory: Wilmington, N.C., then Reno, Nev., and Denver. At the Reno stop, Trump was rushed off stage by security personnel, apparently in response to a protester. A man was led away in handcuffs, and Trump returned to the stage to wrap up his speech. He promised to make appearances in Pennsylvania, Michigan and Minnesota.

Minnesota hasn't cast its electoral votes for a Republican since 1972. A Republican nominee hasn't won Michigan or Pennsylvania since 1988. “We're going into what they used to call Democrat strongholds,” Trump said.

Trump may not have Clinton's celebrities, but he has relied on his family for public support at times.

On Saturday, he made a rare campaign stop with his wife, Melania Trump, whose appearance came as The Associated Press revealed that she was paid for modeling jobs in the United States worth $20,056 in the seven weeks before she had legal permission to work in the country, according to detailed accounting ledgers, contracts and related documents from 20 years ago.