I wrote a rather downbeat column for Politico today, that begins with the extraordinary position that Trump is in right now:
Consider the strength of Trump’s position: If he wins South Carolina by a big margin, he goes into Nevada with momentum, and the latest poll there has him leading by 26 points and pushing 50 percent. If he enters Super Tuesday a week later having won three out of the past three states — and with Cruz diminished by a South Carolina loss and Rubio having won nowhere — he could easily win, say, 10 contests that day.
It might be still be possible to beat Trump at that point if the field is narrowed (states don’t become winner-take-all until March 15), but doing so would involve wrestling to the ground a candidate who will have cut a formidable swath through the first month of the nomination battle.