Rep. Trey Radel (R-FL), the first-term congressman who was convicted of cocaine possession, will resign his post on Monday.

According to Politico, Radel, 37, is expected to hand in his letter of resignation to Speaker of the House John Boehner (R-Ohio) later on Monday. An aide for Radel confirmed the news soon after Politico made the report.

Radel was arrested for cocaine possession in November when he was caught in a federal sting operation.  He was convicted of misdemeanor possession and soon after embarked on a leave of absence from Congress to enter rehab in Florida. Radel blamed his cocaine use on his family’s history of alcoholism and substance abuse.

In light of Radel’s resignation, Florida Governor Rick Scott will hold a special election to determine Radel's successor this summer. Radel’s district in southwest Florida is expected to go to another Republican. As Politico reports, the district voted 61 percent for Mitt Romney in 2012.

Several contenders are already lining up to take Radel’s soon-to-be-vacant seat. Republican Paige Kreegel, who came in third to Radel in 2012, has already launched a super PAC-funded campaign for the seat. Similarly, Lizbeth Benacquisto, a Florida Senate member, and former Rep. Connie Mack, who previously held the district, are expected to make a run for Florida’s 19th.