On Sunday talk shows, he says the 'big tent' party of Reagan and the late Jack Kemp has been replaced by rigid conservatism. BY MARK TRUMBULL Sen. Arlen Specter (D) of Pennsylvania and leaders of the party he bolted last week surprisingly struck a chord of near agreement in discussing the future of the Republican Party Sunday. The question of whether the party can stage a revival without welcoming Northeastern moderates came to the fore on television talk shows Sunday morning. On NBC’s “Meet the Press,” Senator Specter blamed the inner workings of the conservative movement for his own departure,...