How to Beat Donald Trump

...The goal of convincing a Republican primary electorate that Trump is personally unequal to the job of president is unlikely to succeed. They’ve seen Donald Trump dominating and commanding all the other Republican presidential candidates (except Carly Fiorina) in one-on-one personal confrontations on the debating platform. They know, or think they know, that Donald Trump built a gigantic business empire. They have watched as a network “reality” television show portrayed him over 14 seasons as America’s supreme problem-solver and team leader. Now the same party leaders who insisted that Sarah Palin could do the job of president, if need be, want to persuade the rank-and-file that Trump can’t? Good luck with that.

Attacking Trump on national-security grounds will be especially challenging. Many Republicans see immigration as itself a national-security issue, arguably the paramount national-security issue...