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.
Mara LiassonFor Democrats, anything less than 15 net pickups will be a disappointing outcome [in presidency race].
Mara LiassonDonald Trump's staffing up a pretty traditional, very conservative Republican government, not a populist outsider government, at least not yet.
Mara Liasson