Gary Johnson’s decision to endorse Ron Paul reflects poorly on Gary Johnson. Still, I would love to see him run for the Senate in New Mexico, where he was a popular and effective Republican governor. His second-term embrace of drug legalization probably makes him radioactive, and he swore up and down that he wouldn’t seek another office. Right now, the best the GOP probably can hope for in New Mexico is a toss-up contest against Democratic congressman Tom Udall.