(CNN) As President Donald Trump heads to Florida on Tuesday to officially declare his reelection bid in 2020, he's trailing multiple top Democratic candidates in the battleground Sunshine State, according to a new Quinnipiac poll.

Former Vice President Joe Biden bests Trump in a hypothetical matchup for the general election, by 50% to 41%. This includes 7% of Republicans and 54% of independents in Florida who said they would support Biden against Trump. The general election isn't for another year and a half, but Biden has the highest lead over the President of tested Democratic candidates.

Sen. Bernie Sanders of Vermont also tops Trump in a hypothetical contest, though with a smaller lead of 48% to 42%.

Other top Democrats are also beating Trump in Florida, according to the poll, albeit by much slimmer margins than Biden and Sanders. Sen. Elizabeth Warren of Massachusetts is leading the President by 4 percentage points (47% to 43%) and Sen. Kamala Harris of California, former Rep. Beto O'Rourke of Texas and South Bend, Indiana, Mayor Pete Buttigieg are all up by only 1 percentage point against Trump in their hypothetical head-to-head matchups, which amounts to holding no real advantage.

Numbers this far out from a general election are hard to read, and could change between now and November 2020. They should be thought of as a snapshot in time rather than a predictor of the future.

Read More