Following the formula.
Run to the right to get elected, then show your true colors as a lefty.
I can see how Christy convinces the lefties in NJ, but it won't work nationally for 2016. However, it is a winning formula year-after-year for John McCain - lie to your constituents about your conservatism and return to your backstabbing ways after re-election. What I don't understand are the simpleton rubes John McCain continues to convince in AZ election after election.