FORT MYERS, Fla. -

Voters in two southwest Florida counties are going to the polls to pick a GOP nominee for a congressional seat.

The winner of Tuesday's special election in parts of Lee and Collier counties will face a Democratic challenger in the June 24 general election.

The special election was called when Rep. Trey Radel resigned in January after being arrested for buying cocaine.

There are four candidates on the GOP ballot: Lizbeth Benacquisto, a 46-year-old state senator; Curt Clawson, a 54-year-old former CEO of an aluminum wheel company; Michael Dreikorn, a 52-year-old aerospace and defense consultant; and Paige Kreegel, a 55-year-old physician.

According to the Center for Responsive Politics, Clawson has raised $2.8 million. Benacquisto has raised about $980,000, while Kreegel has raised $236,000 and Dreikorn, $17,000.