How an Outsider President Killed a Political Party: Zachary Taylor & the Whig Party

It was summer, and a major U.S. political party had just chosen an inexperienced, unqualified, loutish, wealthy outsider with ambiguous party loyalties to be its presidential nominee. Some party luminaries thought he would help them win the general election. But many of the faithful were furious and mystified: How could their party compromise its ideals to such a degree?

Sound like 2016? This happened a century and a half ago....
http://www.politico.com/magazine/story/2016/06/history-campaign-politics-zachary-taylor-killed-whigs-political-party-213935