The chart above was made from surveys done by the Economist / YouGov Poll between April 11th and August 22nd -- the latest being done between August 20th and 22nd of a random national sample of 1,500 adults (including 1,327 registered voters), with a margin of error of 3.2 points.
Note that the approval of the 115th Congress has been very low all of that time (ranging between 14% and 10%), and shows no sign of improving.
Note also that the difference between the approval of congressional Democrats and congressional Republicans has grown from a gap of only 2 points in April to a gap of 13 points now. If the Republicans continue showing the incompetence they have shown so far, this gap will continue to grow wider -- and that could be disastrous for them in 2018.
