BOISE – Embattled Sen. Larry Craig announced his resignation from the U.S. Senate on Saturday, after a week of intense pressure over his involvement in an airport restroom sex-solicitation scandal that made him the butt of jokes on late-night TV and brought resignation calls from his own national party leaders. "To the Idahoans I represent, to my staff, my Senate colleagues and, most importantly, my wife and our family, I apologize for what I have caused. I am deeply sorry," Craig told a huge crowd of media, supporters, detractors and citizens gathered in front of Boise's historic train depot.