U.S. Sen. John McCain has picked up the endorsement of former actor and Sen. Fred Thompson while opponent J.D. Hayworth gets ready for an event with Maricopa County Attorney Andrew Thomas and State Sen. Russell Pearce. Hayworth and McCain, seeking a fifth term, are battling in the Republican Senate primary this year. Thompson — a former senator from Tennessee and actor on the “Law & Order” television show — announced his endorsement Wednesday. McCain and Thompson both ran for president in 2008. “I’m for John McCain. I hope he gets re-elected. I’ll help him get re-elected if I can. It’s...