Republican presidential candidate Donald Trump speaks with reporters before the start of a town hall event, Monday, Aug. 1, 2016, in Columbus, Ohio Evan Vucci AP
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Trump did not address the controversy during an appearance in Columbus, Ohio, on Monday.

But his running mate, Gov. Mike Pence, sought to create some breathing space from Trump, issuing a press release late Sunday that called Khan an “American hero” and that his family “like all Gold Star families, should be cherished by every American.”

The history of Trump’s campaign suggests the damage will be fleeting. Pundits and Washington’s political class have predicted Trump’s demise almost from the moment he descended down an escalator in Trump Tower in June 2015, describing Mexican immigrants as “rapists” in his campaign announcement.

After Trump last summer disparaged Sen. John McCain’s military record, saying he wasn’t a war hero because the former Vietnam-era prisoner of war had been captured, strategists – and more than a few reporters – questioned whether Trump had crossed a line.

But McCain went on to endorse Trump and the controversy did little to blunt Trump’s momentum in the primaries. McCain himself sharply denounced Trump on Monday for his remarks about the Khans and called for him to “set the example for what our country can and should represent.” But he did not revoke his endorsement.

Following a series of terrorist attacks in Paris last November, in which Trump suggested the outcome would have been different if people had been armed, some strategists and pundits predicted that voters would give more “serious” candidates with government experience a second look.

They did not.

Indeed, after Trump called for a “total and complete shutdown of Muslims entering the United States” following the Dec. 2 attack in San Bernardino, California, his popularity went up in national opinion polls. And then he methodically dispatched his Republicans rivals in the primaries to capture the Republican nomination.

William Douglas: 202-383-6026, @williamgdouglas

Lesley Clark: 202-383-6054, @lesleyclark

David Lightman: 202-383-6101, @lightmandavid