The only thing that will stop him from becoming the next POTUS is possibly the RNC. If they do, then that will finish the Republican party. Otherwise, Trump already has it. The Dems can't even get voters to turn out, and Trump has an increase of millions coming out to vote Republican. If the RNC refuse Trump, then they will self-destruct because regardless of what we feel about Trump, if he gets it fairly, they must not interfere with the voter.