Michigan Rep. Bart Stupak, the congressman who led anti-abortion rights Democrats in the House during health care negotiations, will retire this year, CBS News has learned. He is expected to announce his plans later this morning. Had Stupak sought re-election, he would have faced challengers from both the left and the right backed by interest groups angered by Stupak's health care vote. Stupak negotiated with Democratic leaders down to the eleventh hour for stricter abortion language in the health care bill, but he ultimately voted for it after President Obama agreed to sign an executive order assuring the new laws...