(CNN) - Republican Sen. Mike Lee of Utah will endorse GOP presidential candidate Mitt Romney on Monday, a Romney campaign source confirmed to CNN.
Lee, a popular figure in the Tea Party movement, will be the first member of the Senate Tea Party Caucus to endorse the former Massachusetts governor. Romney previously received the support of most of the Utah congressional delegation, including Sen. Orrin Hatch and Representatives Jason Chaffetz and Rob Bishop.
Utah is scheduled to hold its primary on June 26.
News of the endorsement was first reported by The Salt Lake Tribune.