WASHINGTON (AP) — In a sharp rebuke of his Republican rivals, President Barack Obama said anyone who wants to be commander in chief must support the entire U.S. military, including gay service members. A combative Obama criticized GOP presidential candidates for staying silent when the crowd at a recent debate booed a gay soldier who asked a question of the contenders via videotape. "You want to be commander in chief? You can start by standing up for the men and women who wear the uniform of the United States, even when it's not politically convenient," Obama said during remarks at...