GREENVILLE, S.C. — The Republican presidential candidates met in debate just hours after learning of the death of Supreme Court Justice Antonin Scalia. Beyond that, the debate came at a time when the entire world economy has the jitters; when yet another attempt to bring peace to Syria is in tatters; and when the Republican establishment is more nervous than ever about the continued strength of Donald Trump. And with all of that going on, the most passionate exchange of the entire event was about … relitigating the Iraq War.

It’s not shocking that George W. Bush’s decision to invade Iraq would come up nearly 13 years after the fact; it pops up in Democratic debates these days, too. But the exchange between Trump and Jeb Bush over Iraq Saturday night wasn’t just a passing reference. It was in some ways the debate Republicans mostly didn’t have back in 2004, when Democrats were consumed with the war. And here in Greenville, as has happened elsewhere in this campaign, the candidate named Bush had a hard time dealing with the subject.