Fresh figures on the US jobs market come out Friday, with a lot more than usual riding on them: new stimulus from Federal Reserve, and the poll numbers for President Barack Obama as he fights to keep his job. With the employment situation stagnant this year -- the jobless rate is stuck at a high 8.3 percent -- the new data for August could say a lot about the strength of the economy, as it weathers a global downturn and a domestic stalemate on economic policy. Chances are, economists say, the numbers will fall in the tepid range of July....