If [Donald] Trump drags down a bunch of Senate Republicans, the post-election GOP assessment will be much more pessimistic.

Republican voters are coalescing behind [Donald] Trump, but many Republican elected officials still say they can't support him.

Does Donald Trump accept the results and concede graciously, pursue legal action, or tell his followers to take to the streets?

Well, we had a bunch of primaries and caucuses on the Democratic side. Bernie Sanders won the Nebraska and Kansas caucuses. That keeps his campaign alive. But Hillary Clinton won Louisiana, which was the big prize of the night, so she ended up winning more delegates than he did yesterday.

The winner's margin of victory also matters. If it's a squeaker, that will make the lessons learned for both parties much murkier.

Hillary Clinton is also not a very exciting, inspiring candidate to a lot of the left-leaning Democratic base, especially in Iowa.

This year [2016], however, polls show [Hillary] Clinton winning white college-educated voters by double digits.