(CNN) - The House Ethics Committee will investigate U.S. Rep. Trey Radel after he pleaded guilty to misdemeanor cocaine possession last month.
The freshman Florida Republican previously announced he would take a leave of absence and entered a drug treatment facility after he admitted buying cocaine from an undercover agent.
He was placed on probation.
The chairman of the Republican Party of Florida has called on the tea party favorite to step down. He is up for reelection next November.