U.S. President Barack Obama says he believes the "republic is at risk" if Donald Trump wins next week's election.
Obama campaigned Wednesday for Democrat Hillary Clinton in Chapel Hill, North Carolina — a major battleground state that both candidates consider a must-win if he or she wants to take the White House. He continued on to Florida, where he will also campaign for Clinton.
Obama warned North Carolina voters against getting complacent and thinking their individual vote does not matter. Staying home on Election Day, he said, serves the best interests of those who want to suppress their voices.
WATCH: Obama Calls Trump 'Uniquely Unqualified'
The president reached out specifically to black voters, who he says are "not excited so much" because he is not on the ballot this year.
"I need everybody to understand that everything we've done is dependent on me being able to pass the baton to someone who believes in the same things I believe in," Obama said earlier on the Tom Joyner radio show.
The latest polls in North Carolina show Trump leading Clinton by a fraction of a point.
Trump said during a rally Wednesday in Pensacola, Florida, that Obama has to stop campaigning for "crooked Hillary" and get back into the Oval Office where he belongs, creating jobs and keeping watch on U.S. borders.
Trump said a Clinton presidency would create an "unprecedented and protracted constitutional crisis." He said her handling of emails while secretary of state would put her under investigation.
WATCH: Trump Talks of 'Crisis' of Clinton Win
"She has no one to blame but herself," Trump said to a cheering crowd in Miami. "She's the one who set up her email server."
FBI Director James Comey said last week he is reviving the email investigation after declaring in July that Clinton's handling of emails may have been "sloppy," but not criminal.
The FBI found emails it says may be germane to the Clinton case while investigating a separate case involving a former U.S. congressman.
Clinton predicted authorities will reach the same conclusion they did in July.
"There is no case here," she shouted during a campaign stop earlier this week.
WATCH: Clinton Asks Crowd to Imagine Trump as President
At a campaign stop late Wednesday in Nevada, Clinton told voters to stop and imagine Trump standing in front of the U.S. Capitol taking the oath of office, reminding them that he is someone who demeans women, mocks the disabled and insults minorities.
She said Trump has showed everyone the kind of person he is and the kind of president he would be.
Clinton said she will be "a president who seeks common ground while standing my ground. I will do my best to bring people together, not pull them apart."
The Democratic candidate is scheduled to speak Wednesday evening in Arizona — a western state that voted Republican in 15 of the last 16 presidential elections, but whose growing Hispanic population strongly opposes Trump's plans to restrict immigration and build a wall along the Mexican border.