Sen. Marco Rubio speaks to veterans in Panama City Beach, Fla., on Jul 21, 2016. | AP Photos Rubio leads Democrats in Florida Senate poll

Republican Florida Sen. Marco Rubio is riding high among likely voters in November, according to the results of the latest Monmouth University poll released Tuesday.

Even as Hillary Clinton has opened up a 9-point lead on Donald Trump among likely voters, the freshman senator and former presidential candidate is still beating his two most prominent Democratic general election challengers.

Matched against Rep. Patrick Murphy, Rubio leads 48 percent to 43 percent, with 3 percent responding that they will vote for another candidate and 5 percent undecided. In a hypothetical matchup with Rep. Alan Grayson, Rubio’s advantage is 11 points—50 percent to 39 percent, with 5 percent opting for another candidate and 6 percent undecided.

While neither Clinton nor Trump is seen favorably by strong majorities of likely voters, 47 percent said they have a positive opinion of their Republican senator, while 39 percent said they do not. As far as Rubio’s potential Democratic opponents, roughly 2 in 3 voters said they had no opinion of either Murphy or Grayson.

Even with leads over both potential opponents and a mostly favorable rating, a majority of 53 percent said Rubio’s reason to reverse himself and seek reelection as senator was “more to improve his chances for a future presidential run.” Another 25 percent said it was “more to serve the public,” while 8 percent said it was both and 14 percent said they did not know.

More than 6 in 10 voters (63 percent) said they had not heard about Rubio’s endorsement of Trump, while an additional 64 percent said it would have no impact on their Senate vote. And more than 8 in 10 (83 percent) said the endorsement would have no impact on their vote in the presidential race.

Monmouth University conducted the survey from Aug. 12-15 via landlines and cellphones, polling a random sample of 402 likely voters. The margin of error for the total sample is plus or minus 4.9 percentage points.