TWILIGHT OF THE IDOLS? Sen. Arlen Specter wasn’t the only election-day loser yesterday. President Obama’s  “I love you, Arlen” TV spot failed to turn out Philly voters where Specter really needed a boost. Gov. Ed Rendell’s appeals fell on deaf ears. And Pennsylvania’s AFL and SEIU unions went all out for Specter but lost big-time. The Washington Examiner editorial page says Tuesday’s balloting marked the “twilight of the Establishment.”