Probably not. This would make sense only from a non-liberal white male perspective, the vast majority of whom already vote Republican. Most of the working class white men who still vote Democratic are liberals of one sort of another. A childhood friend of mine is a working class, secular, divorced white man, a prime Trump voter. But he was a union steward for decades. He is an old-fashioned Democrat who hates Republicans because they are the party of management (and Trump is very much management). Republicans have extolled businessmen and called investors (i.e. Wall Street) "job creators" for years and years. If you are labor, Republicans hate you and want to destroy you. I doubt my religiously conservative in-laws will vote for Trump, hell they couldn't even bring themselves to vote for McCain (they voted 3rd party) while they loved Bush. Those white working class people who still vote Democratic do so for reasons that a single candidate is not going to change. The rest long ago went over the the GOP.
Besides Trump will change nothing. One guy talking up protectionism will not make the GOP a protectionist party. He will just be one egotist in a sea of egotists who have no intention of working with him. Think of Carter on steroids. He is term-limited; they can outlast him. Remember, Democratic presidents are GOOD for Republican political pros. Look at how many are in office, not just in Washington, but at the state level too. Under a GOP president many of them will lose their seats in 2018 (they are pros, they know this).
If he tries to unilaterally do stuff the GOP donors don't like, out he goes. Since the guy is a walking scandal factory, they won't have to wait long to get a pretext.
Recall Nixon resigned before he could even be impeached because
he had lost the support of his party leadership. Clinton did not resign because his party leadership stood with him. He was impeached, but remained safely in office. Trump has no such support, if Christie is VP, there is an enormous incentive to boot Trump and go with president Christie. Trump might decide to protect himself by picking Cruz, a guy they hate even more, but do you see a Trump-Cruz ticket winning? All of Trumps campaign pros will oppose Cruz. Trump's ego demands he do everything he can to win, so he will probably choose an acceptable running mate.