(FOX NEWS) Donald Trump amplified warnings Monday that Hillary Clinton is “unfit” for office -- and claimed her election would mire the country in a “constitutional crisis” -- as he fought to gain an advantage after the discovery of new emails kick-started the FBI’s dormant Clinton server investigation.

While the impact of the FBI’s announcement isn’t yet apparent in the polls, the Republican presidential nominee has climbed back into contention in Florida and other battleground states.

Two separate polls released Sunday shows Trump in a tight race in Florida, after having chased Clinton’s lead there for essentially the entire election cycle.

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