I'll mention it a third time. You are not on to something. This isn't a smart idea, and sounds like it could come right out of a Republican's mouth if you just exchanged a few words.
Americans don't really vote. IIRC Only 50 percent of the country does. So much research has gone into trying to find mass groups of people committing voter fraud. The always come empty handed. Republicans desperately want to stoke fear that the opposite side is cheating in mass. All they need is one example. It never happens.
Republicans, on the other hand, have the craziest, most fanatic base. Surely they must be committing voter fraud, or some type of super strategic voting, in huge numbers? After all, the democrats are crazy baby killers. Best example I could find is Rush Limbaugh's "Operation Choas." It was his effort to get Republican voters to vote for Hillary in '08 primary because Obama was leading. Yadayadayada. Who cares. It was dumb. Point is, nothing came of it. I tried to find articles that talked about its effect. Couldn't find any that brought it up, after it was first announced though. No one cared. I finally found an article published years after '08.:
https://www.researchgate.net/public...Evidence_from_Rush_Limbaugh's_operation_chaos
Person seems legit. Found it had no impact.
Now, Trump's supporters are a special variety. Even then, the most I could find are very isolated cases of Trump voters voting twice because R's scared them with propaganda:
https://www.desmoinesregister.com/s...d-voting-twice-trump-pleads-guilty/459718001/
In the end, nothing is notable.
Point is, people don't troll vote. People don't even strategically vote. People don't go out of their way to do anything. They can barely get up to vote the normal way, much less follow any plan to "own the libs".
If the craziest, most dependable voters on the planet (because they do vote every time) NEVER do shit like this, why the hell do you think Joe Rogan's uninspired base is gonna do anything remotely like you suggest? Why do you think they would walk all the way out to Iowa in below freezing weather just to "own the libs", and caucus for Bernie Sanders. These people don't even feel like their votes matter, let alone that trolling for them will matter.
The most boring, yet correct answer, is, if a Joe Rogan fan votes for Bernie Sanders in a primary, they are gonna vote for him in the general election. Because that's what everyone does.