With that said, there's no joke that a lot of people believe in what he's saying. The problem is: A lot of those people live in more rural areas (i.e. Alabama doen't have enough electoral votes to sway an election), Trump needs to win over the people in the cities too. Another problem is that what Trump says he can do when he's working for votes is different from what he can actually vote.
That will be a major problem for Trump. Most of his support is concentrated in the deep-red states (such as Mississippi, Utah, Alabama Wyoming.etc). He doesn't have enough votes to win the swing states, such as Florida, Pennsylvania, Nevada, Ohio, Colorado, North Carolina, Virginia.etc. He could solve that problem by getting a VP candidate, who is popular with this segment.