Chris Christie enters new stage as he eyes 2016 -- bashing other Republicans
Governor Chris Christie of New Jersey speaking at the 2014 Conservative Political Action Conference (Gage Skidmore/Flickr)

TRENTON — For Gov. Chris Christie, it was the next and perhaps final step of a pre-presidential campaign. After months of stumping in the key states, meeting with potential voters and donors, holding town halls and making the requisite attacks on President Obama and Democratic 2016 frontrunner Hillary Clinton, the New Jersey governor took it to…