It’s Time to Worry About Donald Trump

Appearing on Fox on Thursday, Frank Luntz, the G.O.P. pollster who a few days ago conducted a focus group with Trump supporters that received quite a bit of attention, said it is “time for the Republican establishment to accept the fact that Trump is not only a viable candidate, but this lead is real.” Notwithstanding the fate of previous primary front-runners, the same point could be applied to pundits and everybody else. Right now the question isn’t whether Trump could win the Republican nomination; it’s: What is it going to take to stop him?