Hillary Clinton and Florida Sen. Marco Rubio are simultaneously performing well in a new poll of the Sunshine State.

Clinton leads Donald Trump by 14 percentage points, 52-38, among likely voters surveyed by St. Leo University. Rubio, meanwhile, has an 8-point advantage, 46 percent-38 percent, in a hypothetical matchup against Rep. Patrick Murphy, his likely Democratic opponent, and has an 13-percentage-point advantage, 47-34, on Democratic Rep. Alan Grayson.

"Despite being the incumbent, Marco Rubio is attempting to defy political gravity to some extent," said Frank Orlando, director of the St. Leo University Polling Institute, in a statement. "When the top of your ticket is losing by 14 points, it is difficult (and perhaps not sustainable) to be ahead this comfortably."

He continued, "This (lead) might be due to the fact that Murphy has had to answer many questions about his resume and personal life during the critical rollout of his campaign. Still, if things continue to go south at the top of the ticket, it will become even more difficult for Rubio to hold his lead as Republican voters lose the enthusiasm to go to the polls."

Both Rubio and Murphy still face primary opponents en route to a general election matchup this November. They each posted double digit percentage point leads on their opponents in the poll.

St. Leo University surveyed 1,500 adults online, including 1,380 likely voters, from Aug. 14-18, with a 3-percentage-point margin of error.