Reversing one's position after an election is so standard as to be unremarkable; all political persuasions; all topics.  

 "Fence Straddling" is in the political handbook just before the chapter on  "Viewing with alarm!"  

 "I was for it before I was against it". 

 "The choice of a Supreme Court Justice should be deferred for the next President."  

It's so common we have to Google it to see who said it last and even the time before that!