You don't have to win a state to affect the election. If the election is close in the Electoral College then it could be decided by Florida or Ohio. If enough voters, in a swing state, have Ventura as their first choice & either a Democrat or a Republican as their second choice, it may make a difference depending on the specifics.
I understand that. I don't know who will vote for him in enough numbers to affect the election adversely. Since Ventura is an anti-establishment, conspiracy nut candidate, he would hurt the Republicans more than the Democrats, if he hurts anyone, which is doubtful. Nader voters gave us Bush, and for the most part, we learned from it. (yes, I was one) and the DFL has adopted a more robust environmental and consumer protection platform, so that's not an issue any more, I hope. And frankly that Nader business made me a little shy about protest candidates. They are good once in a while, when things are stagnant, as they were in Minnesota when Ventura ran and won, but I'm not sure they are a good idea in tumultuous times like this.