President Bush faces a politically thorny situation _ and stark choices _ now that Senate Democrats twice have blocked John Bolton's confirmation as U.N. ambassador The president could withdraw the nomination, authorize further concessions to Democrats over access to information they seek or bypass lawmakers altogether by appointing the former State Department official to the job temporarily without the Senate's OK. But any of those options could leave the president appearing weak as he confronts sagging poll numbers and fights to stave off a lame-duck label just six months into his final term. "It's time for the Senate to give...