One moment from McCain's 2008 run made clear his character and foretold Trump's rise

It was both the most memorable moment from John McCain's 2008 presidential campaign and a glimpse into the future of the Republican Party and America's angry and divisive modern-day politics.

Played and replayed constantly since the senator's death on Saturday at age 81, the moment seems to presage the rise of the "birther movement," the era of "alternative…