“If you were to devise a plan to stop a runaway nominee,” Republican superlawyer Ben Ginsberg said on MSNBC Tuesday night, “you would have to do a lot of state-by-state organizing, win the delegates at the convention.”

In the late hours of election night — a night in which Donald Trump won seven of 11 Super Tuesday contests — Ginsberg, who knows as much about such matters as anyone in the GOP, offered a clinic on how to stop the front-runner. The first step, he said, would be to slow Trump down at the ballot box in the March 15 winner-take-all elections in Florida, Ohio and elsewhere. “You’ve got to do a lot electorally in the next two weeks,” Ginsberg said. “March 15 is kind of cutoff day.”