Democratic presidential candidate Hillary Clinton warned her supporters on Tuesday against complacency as opinion polls show her holding a clear lead over Republican rival Donald Trump with exactly two weeks left until the Nov. 8 election.

Clinton told voters in Florida, one of the battleground states where the election is likely to be decided, that Democrats cannot afford to slacken.

"I hope you will come out and vote because it's going to be a close election. Pay no attention to the polls. Don't forget, don't get complacent, because we've got to turn people out," she told a rally in Coconut Creek, standing in front of a large sign reading "Vote Early."

Trump also campaigned in Florida on Tuesday. He blasted recent spikes in premiums for health insurance under President Barack Obama's Affordable Care Act, known as Obamacare. Trump promised to repeal and replace the health care law, as soon as he is elected.

"This is why we have to drain the swamp and repeal and replace Obamacare immediately, and I'm the only candidate running for president who will do it," Trump said.

On Monday, the U.S. government said the average premium for insurance plans sold on Healthcare.gov for 2017 rose by 25 percent compared with 2016.

But with polls showing Trump trailing Clinton, Trump has asked his campaign to cut back on work identifying candidates for jobs in his future administration and to focus instead on bolstering his chances on Nov. 8, according to two people familiar with the campaign's inner workings.

COLIN POWELL TO VOTE FOR CLINTON

An average of national polls on the RealClearPolitics website since mid-October gives Clinton a lead of more than 5 percentage points, as Trump fights off accusations that he groped women and faces heavy criticism for suggesting he might not accept the result of the election if he loses.

Clinton received a further boost when Colin Powell, who served as Republican President George W. Bush's secretary of state and was chairman of the U.S. military's joint chiefs of staff under his father, Republican President George Bush, said on Tuesday he would vote for her.

Trump denies the accusations of sexual misconduct and says the election is rigged against him, although he has not cited widely accepted evidence to back that up.

On Tuesday, Trump told Reuters that Clinton's plan for fixing the Syrian civil war would "lead to World War Three," because of the potential for conflict with military forces from nuclear-armed Russia.

In an interview focused largely on foreign policy, Trump said defeating Islamic State is a higher priority than persuading Syrian President Bashar al-Assad to step down, playing down a long-held goal of U.S. policy.

Clinton has called for the establishment of a no-fly zone and "safe zones" on the ground in Syria to protect noncombatants.

The two candidates have sparred in recent days over the U.S.-backed Iraqi military push to take the northern Iraqi city of Mosul from Islamic State, which Trump described as a "total disaster."

"He's declaring defeat before the battle has even started," Clinton, who was secretary of state during President Barack Obama's first term, said on Tuesday.

She urged supporters to participate in early voting, which began this week in Florida.

"Nobody should want to wake up on Nov. 9 and wonder whether there was more you could have done," Clinton said.

Clinton also appeared on Tuesday at the Univision studio in Doral, Florida, on "El Gordo y La Flaca" ("The Fat Man and the Skinny Woman"), a long-running entertainment show aimed at Latinos.

She talked about everything from her hopes for the peace process in Colombia to baking chocolate chip cookies, in an appearance low on policy but that underscored the importance of Latino voters in the battle for Florida's 29 electoral votes.

Clinton maintained a commanding lead in the race to secure the 270 Electoral College votes needed to win the White House, according to Reuters/Ipsos States of the Nation project results released on Saturday. They showed that Clinton had a better than 95 percent chance of winning, if the election had been held last week.