MIAMI -

U.S. Sen. Bill Nelson leads in his bid for reelection, according to a brand new poll.

The Public Policy Polling study found Nelson with 49 percent support to 36 support for Connie Mack IV, if they were to face off in the general election in November.

Nelson also bests Republican George LeMieux 48 to 35 in a theoretical matchup between those two.

In the race for the GOP nomination, Mack IV distances his rivals. Among Republican primary voters, Mack IV leads with 34 percent support. LeMieux comes in second with 13 percent support.

Mike McCalister in third with 10 percent and former Congressman Dave Weldon in fourth with 6 percent.

Mack IV received a key endorsement from former Florida Gov. Jeb Bush on Wednesday.

“Bill Nelson continues to be favored for reelection,” said Dean Debnam, President of Public Policy Polling. “And Connie Mack IV is still the clear favorite on the Republican side, with Dave Weldon having little immediate impact on the race.”

The Public Policy Polling study surveyed 642 Florida voters and 448 Florida Republican primary voters from May 31 to June 3.

The margin of error for the general survey is +/-3.9 perent and +/-4.6 percent for the Republican primary survey.