The Trumpening is a result of the increasing frustration felt in America at the failure of "throw the bums out". Landslide election victories for the nominally "small government" party in 2010, 2012 (except for the defeat of the sad sack big government presidential nominee), and 2014 have led to a big fat nothing. Obamacare is still here. Huge fiscal deficits are still here. An out of control, politicized bureaucracy still is coming after Middle America. Nothing has changed.
But the only constant is change. It may be good, it may be bad, it may be neutral. But it's different.