As one person said to me , Republicans know [Donald] Trump is a stain on their party.

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

If Pat Toomey of Pennsylvania wins, for instance, it will tell Republicans that their own brand hasn't been hurt too badly by [Donald] Trump's negatives.

Donald Trump is a candidate who divided his own party more deeply than any presidential candidate has before.

What does [Hillary] Clinton do if she loses? Concede? Blame the Russians? Or the FBI?

Meanwhile, there are some traditional battleground states - like Ohio and Iowa - that are becoming older, whiter and less educated. That's turning them from true battlegrounds into more reliable red states.

The [Hillary] Clinton campaign's recent travel schedule shows how seriously it takes this problem. She and her surrogates have held rallies in cities like Philadelphia, Detroit and Cleveland, trying to boost turnout among African-Americans.