Many people feel he did cross a line in a way he hadn't even done before and also that Republicans had to speak out because they believe Trump poses a danger to the party.
Mara LiassonThere's a lot of anxiety about terrorism among the country at large. There's also a feeling the country has stagnated.
Mara LiassonAfter months and months at the top of the polls, there is a real possibility that Donald Trump could be the nominee.
Mara LiassonFor Democrats, anything less than 15 net pickups will be a disappointing outcome [in presidency race].
Mara Liasson