For Democrats, anything less than 15 net pickups will be a disappointing outcome [in presidency race].

If they can get 15 or higher, it will be a very bad night for House Speaker Paul Ryan. Ryan twisted himself into a pretzel by endorsing but not always supporting Donald Trump. Now, he's facing the prospect of a slimmer majority, with fewer moderates. Conservative members in the Freedom Caucus have already sent warning shots threatening Ryan's tenure as speaker.

Republican candidates have won whites with college degrees in every presidential election since polling began.

As those states and others in the South and West become more diverse and educated, they will become harder for the Republican Party - in its current form - to win.

[Donald] Trump has said he will accept the results of the election - if he wins. And he has said the only way he can lose the election is if it's stolen from him. Weeks before any votes were cast, he was predicting widespread voter fraud. So if he loses, what does he do?

No one is predicting that the Democrats will get the 30 pickups they need to take back the House majority.

If the Congress is going to spend its whole time hauling up regulators and bureaucrats and looking like they're focusing on tiny, trivial things, instead of jobs and the economy, it could be a problem for them.