WASHINGTON (AP) - An $838 billion economic stimulus bill backed by the White House survived a key test vote in the Senate on Monday despite strong Republican opposition, and Democratic leaders vowed to deliver legislation for President Barack Obama's signature within a few days. The vote was 61-36, one more than the 60 needed to advance the measure toward Senate passage on Tuesday. That in turn, will set the stage for possibly contentious negotiations with the House on a final compromise on legislation the president says is desperately needed to tackle the worst economic crisis in more than a generation....