Florida Gov. Charlie Crist would caucus with Senate Democrats if he wins Florida’s three-way U.S. Senate contest on Tuesday, a close advisor told Washington Wire Friday.

That’s a big “if.” Mr. Crist is trailing Republican candidate Marco Rubio in most polls. But the declaration by Florida trial lawyer John Morgan sheds light on one of the many mysteries in the Bill Clinton-Charlie Crist-Kendrick Meek imbroglio.

“Crist is going to caucus with the Democrats,” Mr. Morgan said. “I don’t think there’s any ifs, ands or buts about it. It would be, in a very tight year, almost like a Democratic pickup in a solid Republican state.”

Mr. Morgan says the question of whether Mr. Crist would side with Democrats had nothing to do with any purported deal under which Mr. Meek would quit the race.