The charts above are from the Pew Research Center. They questioned 11,001 adults nationwide between July 27th and August 2nd, and the survey's margin of error is only 1.5 points.
The survey shows that only 38% of Americans approve of the job Donald Trump is doing, while 59% disapprove -- a negative gap of 21 points. Those are not the kind of numbers that get a politician re-elected.