These charts use information contained in the newest Economist / YouGov Poll -- done between December 10th and 12th of a random national sample of 1,338 registered voters with a margin of error of 2.9 points.
It shows that the public is still not enamored with either of the two major political parties -- but they dislike the Republicans more than the Democrats. While the Democrats have a net approval rating of a negative 11 points, the Republicans have a net approval rating of a negative 33 points -- far worse.
And in the generic ballot, Democrats are favored over Republicans by 8 points.
Republicans are hoping that ramming through their tax reform bill will save them. I think they're wrong. The public knows their bill is just a massive giveaway to the rich and corporations, and they don't like it.