By Michael Dinan Staff Writer April 10, 2005 Though Republicans in some circles are rallying around beleaguered House Majority Leader Tom DeLay, R-Texas, one prominent Republican yesterday dissociated himself from the powerful and controversial lawmaker. "He is an absolute embarrassment to me and to the Republican Party," U.S. Rep. Christopher Shays, R-Bridgeport, told more than 50 Greenwich residents yesterday morning at Town Hall. He was in Greenwich to host a public forum, open to all political parties, on whatever pressing issues attendees were interested in discussing.