No Republican has ever won South Carolina and Iowa or New Hampshire, as Trump has, without going on to win the nomination.

Why is it so many political parties never learn that lesson? There was an obsession on the right to get [Hillary] Clinton. There was an obsession on the left to get - frankly, look at - look at the liberals in the early 1980s with [Ronald] Reagan. They got so caught up in the personality that they could n`t see the forest.

The White House is dismissing these fiery town halls as the result of professional protesters. Well, that`s exactly how President [Barack] Obama team`s and Democrats dismissed the 2009 town halls and Tea Party protests.

[Donald Trump] even quoted a tweet from a self-identified 16-year-old as a way to justify crazy unsupported claims about the popular vote.

I think that we may lose the argument, but I think we have to talk about gun control.

With Rudy [ Giuliani], [Donald Trump] will - the minute they push him too far and start manipulating, he will - he will lash out.

Republican Michigan Congressman Justin Amash said, no president is allowed to burn the first amendment.