Ex-astronaut Mark Kelly announces run for McCain Senate seat
By JONATHAN J. COOPER , Associated Press PHOENIX (AP) — Retired astronaut Mark Kelly, who became a prominent gun-control advocate after his wife, former U.S. Rep. Gabrielle Giffords, was shot in a failed assassination attempt, announced Tuesday he will run to finish John McCain’s last term in the U.S. Senate. Kelly, 54, is a top…