Trump leads the people who have decided that, if we get many more Third World immigrants, the demographics of the US will have shifted so that the takers outnumber the producers by so much that no conservative will EVER AGAIN be elected, until the US goes down in flames.
Trump appeals to the people who are primarily concerned about having a job, and having their families safe, and who care much less about gay marriage and abortion than they do about their primary issues.
We'll find out when he loses against Hillary Rodham Clinton in the general election