Donald Trump's lead over Marco Rubio in Florida has shrank to just five points with a little more than a week remaining before voting booths open in the Sunshine State for the Republican Presidential Primary Elections.

A poll conducted by the anti-Trump group Our Principle PAC now finds him narrowly leading Rubio 35 to 30 percent, with Texas senator Ted Cruz at 16 percent and Ohio Governor John Kasich at 9 percent.

Anti-Trump Messages hit the Airwaves

In recent days, Our Principle and its allies have flooded the airwaves with a wave of anti-Trump messages the group insists are now taking hold.

Not long ago, a Public Policy Polling survey had Trump up by 20 points in Florida, while a Quinnipiac University poll had him on top by 16 points.

Word is Trump is now planning to dedicate more resources to the area, namely kicking off an advertising blitz across the state.

Rubio has already guaranteed a win in his home state and indeed the Our Principle poll finds him with the most favorable rating of all the candidates.

Meanwhile, 32 percent of respondents now insist they would "never" vote for Trump and 30 percent of that total argue they feel "strongly" about their position.

When it comes to his home state of Ohio, Kasich finds himself in a position similar to the one Rubio is desperately trying to dig himself out of.

Trump Also Topping Kasich in Ohio

A recent Quinnipiac poll found him trailing Trump by five points among likely voters, at 31 to 26 percent. Cruz places third at 21 percent followed by Rubio at 13 percent.

"The Donald Trump train begins the three-week campaign for Ohio's crucial delegates on the right track and holds a small lead over the Buckeye State's own governor, John Kasich," Quinnipiac assistant director Peter A. Brown said at the time the poll was released. "A Kasich Ohio win is crucial to the Republicans trying to stop the New York businessman's nomination."

On the Democratic side in Ohio, former Secretary of State Hillary Clinton leads Sen. Bernie Sanders of Vermont 55 to 40 percent in the Quinnipiac poll.