Mathematically, I agree, but I thought the NE flip was the Romney argument. And when we learned he could not carry his home state of Massachusetts, the idea was that since we was from the NE he'd play better with independents and swing states.
Also, the elites went into the NJ to help Christie get Hispanic and Black votes. This was to set him up as a more appealing candidate. GW did in Texas in 1998- made a play with Blacks and Hispanics for the Governor race. He did pretty good but in the national election in 2000 his results with minorities was about the same as other previous GOP contenders.
Democrats were willing to vote for him for Gov but they'll never abandon the 'gimme something for free' party in 2016!