Published: Sep 21, 2010 11:26 AM EDT
Updated: Sep 21, 2010 7:59 AM EDT

NAPLES, Fla. (AP) - A lawsuit filed in Collier County is seeking refund of millions of dollars contributed by Republican donors to Gov. Charlie Crist's campaign for the U.S. Senate.

The lawsuit claims that Crist should repay the money because he left the GOP in April to run for the Senate as an independent. As much as $10 million is at stake.

A Collier County judge scheduled a hearing Tuesday on whether the case should become a class action covering all Republican contributors to Crist.

Crist's attorneys oppose making the case a class action. They argue that people often have reasons besides party affiliation to contribute to political candidates.

Crist faces Republican Marco Rubio and Democrat Kendrick Meek in the November election.