“The longer it goes, the greater the panic is going to build,” said Alex Castellanos, a longtime Republican strategist. “And that means you may not have the luxury to flirt with an undeveloped, budding candidate. Trump has set the Republican Party on fire, and if you’re going to put that fire out you don’t have time to waste. You’re going to have to grab the biggest blanket you got and throw it, and right now that’s Jeb.” . . .
Privately, Mr. Bush’s top strategists, who have become increasingly fixated on halting Mr. Walker, believe that Mr. Trump is nothing short of a godsend. That is because Mr. Trump is drawing support from voters — blue-collar, less-educated, more conservative — who are unlikely ever to support Mr. Bush but are essential to Mr. Walker’s candidacy.