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.
Mara LiassonDonald Trump's staffing up a pretty traditional, very conservative Republican government, not a populist outsider government, at least not yet.
Mara LiassonRepublican voters are coalescing behind [Donald] Trump, but many Republican elected officials still say they can't support him.
Mara Liasson