As the nation mourns Senator Edward M. Kennedy, we will again be reminded of his last major political alliance -- bringing Caroline, his shy niece, into the limelight to support Barack Obama. It was hoped that she would then follow in the Kennedy footsteps and make a push for the powerful Senate seat in New York. For a variety of reasons, she withdrew at the 11th hour. Dems embrace dynasty politics - Charles Mahtesian - Politico.com But as the last surviving Kennedy brother, Uncle Ted still had plans for Caroline, an ambassadorship was whispered. Then came the news: "Vatican sources...