Missouri House Speaker Dean Plocher, R-Des Peres.

Missouri House Speaker Dean Plocher, R-Des Peres.

Missouri House Speaker Dean Plocher ended months of speculation about his political future Wednesday, officially announcing his candidacy for lieutenant governor.

Plocher, a Republican attorney from Des Peres, joins state Sen. Holly Thompson Rehder, Franklin County Clerk Tim Baker and St. Louis County resident Paul Berry in the GOP primary. All four are vying to replace Lt. Gov. Mike Kehoe, who is running for governor. Democratic state Rep. Richard Brown is also running.