This happens every election cycle - the polling companies create a fake lead to dispirit our side and encourage the Democrats, then the races suddenly tighten in the home stretch when the polling companies want to salvage their reputations and hopefully scare the Democrats into showing up.
Polls are largely worthless.
I would add the Democrats and Republicans both have good polls, not the political manipulations that the public sees, and the Democrats appear in a panic right now, going so far as to distancing themselves from the Democratic Socialists while the GOP is brimming with confidence. The polls we see show no reason for either.
Polls are nothing but a way to lead public opinion and not to reflect it.
Anyway the Liberal Cook Report actually moved a number of races from solidly Republican or Lean Republican into the Democrat camp and that is quite odd, but this is the final push and they need to disspirit the Republicans. Oh, and Rep. Salazar was one such; she is the Republican who told Trump he's angered her constituents by deporting illegals, and her constituents are quite wroth with her. Stupid dufus may have cost us a solid GOP seat.
But the point is this is par for the course and how the polls operate. Always there is a surge right before the election so the pollsters can justify themselves. I think Cook is making their final push before reversing a week before the election.
Frankly, these polls should be illegal. They are election-tampering and little more.
I remember the election of 2000 when Rush Limbaugh read the exit-polling results and called it for "Bush in a squeeker". He was followed by Charles Jaco who was furious at Rush for giving that information out before all the votes were in. But that is what the media does, not with the exit polls so much as with the polls prior to the election, which are nothing but projections, prophecies about how it will go. If Jacko had reason to be mad at Rush for this how could he or anyone else think it o.k. to spout off about what the public thinks based on telephone surveys prior to the election?
Unlike Jaco Rush never claimed to be an objective journalist but rather a partisan commentator.
Aat any rate don't get caught up in the back and forth of polling; it's all political theater designed to manipulate the public.