An automated poll of more than 1,000 registered voters in Florida's bellwether county of Hillsborough — which Barack Obama won comfortably in 2012 and has gone with the winner in every election since 1960 except one — shows Donald Trump leading Hillary Clinton 44.6 percent to 43 percent to 6.9 percent for Libertarian Gary Johnson. That's within the margin of error for the Sept. 7 robo poll by St. Pete Polls, but Hillsborough County has generally been seen as trending into a reliably Democratic County.

"This should be a clarion call to Democrats not to take this election for granted," said Democratic consultant Barry Edwards, who paid for the poll on behalf of local candidates.

The warning/qualifier here is that St. Pete Polls does not reach cell phones, which means it likely misses younger voters.