If Trump is seriously losing California by 30, he's not winning the election. There's no way his support can be so selective that he does this badly in the dark blue states, and yet somehow win light blue states like Pennsylvania.
He is completely different from any past Republican candidate in the past 40 years or more.
We should expect his support to be more selective.
Not so selective that he'd lose a state like California, where many demographic groups are well represented, by thirty points (seven points worse than Romney) and yet do significantly better than Romney in all of the right places. The fact that he's "different" doesn't mean that the results will be that convenient for him.