Letter Supports Anti-Kerry Bid Over Abortion By PAM BELLUCK Published: October 19, 2004 OSTON, Oct. 18 - A canon lawyer seeking to have Senator John Kerry excommunicated by the Roman Catholic Church because of his support for abortion rights said on Monday that he had ammunition in the form of a letter issued at the request of a senior Vatican official. The lawyer, Marc Balestrieri of Los Angeles, who heads a conservative Catholic nonprofit organization called De Fide, also said that, based on the letter, he would now seek to have four other Catholic politicians excommunicated: Senators Edward M. Kennedy...