Republicans don’t buy that Trump isn’t electable
As Meredith and Monica noted, Haley really emphasized electability in her speech. The difficulty with that argument is that poll after poll shows Republicans think Trump is electable in the general. For example, this YouGov/The Economist poll from early January shows 82 percent of Republicans saying Trump would definitely or probably win the general election, but only 37 percent say the same about Haley.
—Mary Radcliffe, 538