Democrat Hillary Clinton brought out the "big guns" Monday night, as the most caustic, exhausting and, at times, surreal U.S. presidential campaign in modern political history headed toward its climax.
Tens of thousands of fans turned out for an all-star rally in Philadelphia that included former President Bill Clinton, President Barack and first lady Michelle Obama, and rock superstars Bruce Springsteen and Jon Bon Jovi.
Clinton said Democrats believe in a "hopeful big-hearted America," saying the only way to build on the progress made in the last eight years under Barack Obama is to get out and vote.
WATCH: Clinton Says Choice 'Could Not Be Clearer'
Obama told the crowd that Clinton has the respect of other leaders around the world, and that she is "strong, steady and tested."
He said he is betting the American people will reject fear and embrace hope.
Lady Gaga and Bon Jovi will join Clinton at a final midnight campaign rally in North Carolina.
WATCH: Obama Addresses 'Crazy Stuff' in Election
Meanwhile, Republican Donald Trump appeared before his own rousing crowd of followers during a marathon series of campaign stops in five battleground states he must win if he wants to be president — Florida, Michigan, New Hampshire, North Carolina and Pennsylvania.
"You have one magnificent chance to beat this corrupt system and to deliver justice for every forgotten man, every forgotten woman, every forgotten child," he said in Pennsylvania.
Watch video report from VOA's Jim Malone:
He said the vote Americans will cast Tuesday will be the greatest one they ever cast in their lifetimes.
"We will make American wealthy again, we will make America strong again, we will make American safe again, and yes, we will make America great again."
WATCH: Trump Urges Voters to 'Deliver Justice'
Polls heading into Election Day on Tuesday give Clinton a 2-to-3-point lead over Trump, but Clinton has said she is taking nothing for granted.
Tens of millions of Americans already have done that by casting early ballots. For voters who have not, polling places open early in the morning in many places and will close starting at 7:00 pm in several eastern and central states.
Earlier Tuesday, the U.S. Supreme Court rejected a last-minute suit by the Ohio Democratic Party seeking an order to prevent Trump supporters from carrying out actions that could be interpreted as voter intimidation.
Justice Ruth Bader Ginsburg said Ohio already has laws in place to prevent such harassment.
Trump has called on his backers to watch polling places where he has said the voting might be rigged.
Trump has not presented any evidence to back up his suspicions. But some Democratic officials say Trump was thinking about American-American neighborhoods that lean heavily toward the Democrats.