The two charts above reflect the results of the latest CNN News / SSRS Poll -- done between September 17th and 20th of a random national sample of 1,053 adults, with a 3.7 point margin of error.
It shows the Democratic Party with a 12 point advantage in favorable ratings over the Republican Party (41% to 29%). That 29% favorable rating for the GOP is the lowest rating it has ever received in the CNN/SSRS poll.
The Democratic Party also has an 11 point lower unfavorable rating than the Republican Party (51% to 62%).
A word of caution to Democrats. This will not automatically turn into a win at the polls in 2018. There's work to be done to make sure that we have an extraordinarily large turnout for the off-year election. If we have a large turnout, I believe we can flip one or both houses of Congress.