Missouri House Speaker John Diehl is resigning from the state Legislature; his resignation is effective today. Diehl is stepping down and acknowledging a serious error in judgment after exchanging sexually suggestive text messages with a college student serving as a Capitol intern. He admits the mistake calls into question his ability to lead.

Republican House members met Thursday night and chose House Majority Leader Todd Richardson to succeed Diehl as Speaker. Richardson is expected to be elected by the full House Friday morning.