flip-flopper

US informal a person who makes a complete change of policy, opinion, etc

Words nearby flip-flopper

Secondly, he will rightly be labeled as a flip-flopper on this issue for his “evolution” on it in just two years.

‘Bridgegate’ Won’t Be the End of Christie 2016, but the DREAM Act Could Be |Dean Obeidallah |January 8, 2014 |DAILY BEAST
But on the other hand, if he does that, he's a flip-flopper.

Why We May Yet Have a Culture War |Michael Tomasky |May 14, 2012 |DAILY BEAST
In politics, the flip-flopper label is deemed deadly, the fingering of a candidate with no fixed principles.

Romney’s Secret Signals May Convince Voters He’s Truly Center-Right |Howard Kurtz |April 18, 2012 |DAILY BEAST
Why, then, has the flip-flopper label attached itself so much more firmly to Romney than to the equally flexible Gingrich?

Why Newt Gingrich Is a Stronger Presidential Candidate Than He Looks |Michael Medved |November 29, 2011 |DAILY BEAST

He was being defined as a flip-flopping Mormon—or a Mormon flip-flopper.

More Juicy Election Details |The Daily Beast |January 11, 2010 |DAILY BEAST