The reasons for his Black support are incumbency, which always provides an advantage, media visibility, which affects uneducated voters (that's most of the voting public,) and his connections with Booker, a visible, Black politician with a pseudo-celebrity status. None of these will be easily translatable on the national stage, since he won't be an incumbent (and if he's running against Hillary, she'll actually be able to net some of that incumbent aura,) Booker won't endorse him over whoever the Democratic candidate is/the Dem candidate will have the support of other hyper-visible Black leaders, Obama included, and his media status won't be significantly greater than the Dem candidate, especially if it's Hillary.
Basically what The Real is saying is that he's getting the uneducated voter vote because of his visibility and any progress he's made with minorities is lost outside of his State.
But beyond that shyt.... on the national stage, he is going to do worse because people will look at the record closer. They will see the state gov control that's place on black and hispanic school districts in NJ... All his slightly -racist comments will be blown out of proportion. Plus he will have to deal with looking like a typical fat cac. Plus he's worse than Bidden with the verbal slip ups.... he is a blow hard that blatantly talks shyt, so it's guaranteed he's gonna say some insensitive race shyt.
lol, and I know this is messed up, but his gay marriage stance will def hurt him with black GOP members and even some black moderates. The people that actually like his stance on that will vote dem anyway.