It'll probably split but maybe Clinton a little bit more. A lot of people may call this BS but I think Republicans, especially people who are more likely to support Trump than any other Republican, have more of an opposition to libertarianism and Gary Johnson than most Democrats do. More Republicans are like Seriously and Santander not RINO Tom or Vosem.
Yeah, my gut says this may be the case, and it might split almost equally. Plus a smaller fragment bouncing to another third party candidate or not voting at all. It feels like he draws a healthy sampling from both Trump and Clinton, but I don't know if that's ever been proven in any poll.