Just hours after three leading Democrats called on him to resign, Rep. Anthony Weiner announced he will take a leave of absence from Congress and enter a treatment program. Saturday began with a major blow to Weiner's chances for survival, as House Minority Leader Nancy Pelosi, Democratic National Committee chair Debbie Wasserman Schultz and Rep. Steve Israel, chairman of the Democratic Congressional Campaign Committee, all issued statements urging Weiner to leave Congress. ....