Republican candidate Marco Rubio has retaken the lead over left-wing independent Charlie Crist in the race for United States Senate in Florida. The leading Democratic candidate, Kendrick Meek, lags far behind both men at just 15% support.

The latest Rasmussen Reports telephone survey of Likely Voters in Florida finds the two candidates neck-and-neck again this month, with Rubio earning 36% support and Crist, the state’s current Republican governor, capturing 34% of the vote. Prospective Democratic candidate Kendrick Meek remains a distant third, picking up 15%. Fourteen percent (14%) of the state’s voters remain undecided

Meek, while the frontrunner for the Democratic nomination, isn’t the strongest candidate Democrats could nominate in November. Billionaire Jeff Greene, who controversially made his fortune in the real estate market leading up to the current financial crisis, does better:

If Meek’s Democratic Primary challenger, billionaire real estate Jeff Greene, is their opponent, Rubio gets 37% of the vote to Crist’s 33%. Greene earns 18% support, while 12% remain undecided. Crist’s support is down eight points from the previous survey, while Greene is up five.

So a Greene nomination would hurt Crist while improving the chances for Democrats in November, albeit not by much.

The better news for conservatives: Despite now leading, Rubio has kept his powder dry. Television ads reminding voters of Crist’s endless list of flip-flops, from cap-and-trade to the stimulus package to remaining in the Republican Party, have yet to hit the airwaves. Once they do, expect Rubio’s support to climb at the expense of Crist.