Battleground: Florida

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Democratic presidential candidate Hillary Clinton and Republican presidential candidate Donald Trump during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016.

(NBC News) The race for the White House could hinge on Florida.

With 29 electoral votes, Florida is must-win for Trump, and he has a new opening on an old issue: Obamacare.

The White House has revealed the cost of premiums will go up next year by an average of 25-percent.

Trump charged it’s going to be worse.

“That is such a phony number. You’re talking about 60, 70, 80 percent increases not 25 percent 33,” he said.

Still, Trump stumbled in front of his own workers at his Doral resort, claiming “All of my employees are having a tremendous problem with Obamacare.”

The truth is they aren’t. The majority of his employees get health coverage through his company, and don’t rely on Obamacare at all.

Hillary Clinton was also in Florida to rally supporters.

Clinton’s main worry now, says a top aide, is supporters seeing the polling showing her ahead and not voting.

Read more: http://nbcnews.to/2eP5ZEW