WASHINGTON (AP) — In a sharp challenge to the GOP, President Barack Obama proposed paying for his costly new jobs plan Monday with tax hikes that Republicans have already rejected, and he accused them of political motives if they still refuse to go along. "The only thing that's stopping it is politics," Obama declared. The president's proposal drew criticism from House Speaker John Boehner, who'd previously responded in cautious but somewhat receptive tones to the $447 billion jobs plan made up of tax cuts and new spending that Obama first proposed in an address to Congress last Thursday. "It would...