Not that it matters much to me, but would be interesting to know of the party that he would run his campaign from.
Basically speaking, as with every other candidate that ran as a Republican starting with Reagan, what they offered to the blue collar working class folks was a huge stinking pile of candy coated bullshit, while giving themselves and the aristocrat class they belonged to every single thing they could possibly get away with and then some. That it still works so well is still somewhat of a mystery to me as I still can't believe that folks can be so ignorant, so oblivious, so willfully induced into a state of denial and alt-right alt-reality, that they would keep buying into a blatantly obvious false bill of goods, a plain and undeniable case of bait and switch.
So if Johnson ran as a Repub, he'd arguably have to run his campaign the same way, given the propaganda induced desires of the base that's already in place and the ideological bent that he'd be obligated to swear allegiance to.
If he ran as Dem it would give him free license to argue for and be a rather compelling proponent for the wishes and desires of the working class folks who would rather vote for a person that serves their economic interests rather than some singe issue that was overly hyped and blown way out of proportion to the actual benefits that the Dems have fought for and achieved for the working class.
That both Reagan and Trump has shown, celebrity status is an important influential factor in winning elections and something that can't be ignored when considering the viability of a candidate's chances toward being a winner. IMO, Johnson's chances of bridging the ideological gap between the parties at the voting booth has a much higher probability factor than Hillary or Bernie ever could muster. This in itself is a huge plus for Johnson no matter what flag he hoists and rides under.
That Johnson has for the most part presented himself as a person who is free of issues that could damage his chances at the polls is another plus in his favor.
Proviso: I'm framing my comments around the fact that Reagan had, as with Trump at present, created a new sense of what's normal in the world of politics irt what is plausible and acceptable in the here and now insofar as what we expect in the way of qualifications for the job.