Hve you not been watching the news? Trump has brought more people out to vote. republicans have been having higher voter turn outs this election cycle, and democrats lower. Trump is looking very well placed to take the presidency. And he has done it on a small budegt, with more media attention. He represents what americans want, and what wwe need at this time.
Most polls have him getting beaten by Clinton and even worse by Sanders in the general election. And Clinton has more primary votes than anyone (Trump included).
He's done well at beating a group of largely dull Republicans, but the general election is a very different ball game and that's why Republicans tried very hard to deny him the nomination, because most polling data shows he would lose and lose badly in a general election.