If [Donald] Trump loses narrowly, it will make it much harder for the GOP to unify. Under that scenario, the Trumpists are likely to argue that the election was lost because the Republican establishment failed to rally around the choice their own voters made.

The Republican Party, right now, is a conservative populist party.

Senate races have tightened along with the presidential race. Watch to see how many Republican Senate candidates outperform Donald Trump - and how many hang on to their seats in states that he loses.

If she Hillary Clinton win just two of the three big battleground states - North Carolina, Florida and Virginia - she will have shut off Trump's path to 270 electoral votes, even if he wins the other toss-up states.

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

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.

Well, it's possible that the new infusion of ad money against Donald Trump kept his margins in Kentucky and Louisiana down a bit. But we're also seeing something that we've never seen in 100 years, which is we are seeing the crackup of a major American political party.