Breaking it Down, Election 2016: Can Trump Really Win?

Donald Trump leads the Republican field but the conventional wisdom from the political chattering classes is there's no way he can win the GOP nomination.

Why? Even though Trump has 26-28% in the polls and is ahead of everyone else, inevitably other candidates will drop out and The Donald will face Jeb Bush or Marco Rubio or John Kasich or… one final survivor.
The thinking is all the anti-Trump voters will line up behind that one Trump opponent and The Donald won't be able to break through his existing level of support.

Plus, Trump lacks staffing, endorsements and boots on the ground in many primary and caucus states.
Will he still be able to win the nomination?

What do you think?