These charts are from a new Economist / YouGov Poll -- done between May 13th and 16th of a random national sample of 1,500 adults (including 1,298 registered voters), with a margin of error of 3.2 points.
It shows that the Republican-dominated Congress may be even more unpopular than Donald Trump. Their job approval rating is only 11% while 55% disapprove -- a huge gap of 44 points. And it is Republicans who are getting most of the blame for the inability of Congress to accomplish anything. About 45% blame the Republicans, while only 15% blame the Democrats -- a gap of 30 points.
If the election was held today for Congress, about 40% would vote Democratic and 33% would vote Republican -- a significant 7 point gap. The GOP has more than a year to turn things around, but if they continue down their current path, the 2018 election could turn out very badly for them.