New in The Texas Tribune:
• Simpson Files for Speaker, Wins Backing of Hughes: "State Rep. David Simpson, R-Longview, filed papers to challenge Joe Straus, R-San Antonio, for speaker of the House, he said in a letter to colleagues Monday morning. Shortly after, state Rep. Bryan Hughes, R-Mineola, dropped out of the speaker's race and endorsed Simpson."
• Railroad Commission Preparing Rule Changes for Oil and Gas Drilling: "A major overhaul to oil and gas drilling rules is under way at the Texas Railroad Commission. The initiative has received a cautious welcome from both environmentalists and some industry groups."