As that wise sage Yogi Berra once said, "It's deja vu all over again." In 2004, the last time then Republican Senator Arlen Specter was facing a tough Pennsylvania primary challenge, he received eleventh hour endorsements from top GOP players that saved him from a humiliating primary defeat. He went on to win reelection and then promptly betrayed both the voters and his party by becoming a Democrat. Now, in another tough primary challenge, his new party's establishment is rushing to his aid. Senator Specter who once held a commanding lead of his primary challenger, US Representative Joe Sestak (D-Pennsylvania)...