Josh Marshall of Talking Points memo regularly polls his journalistic colleagues, most of them Democrats, about who will will win the Republican nomination. Above, results from midsummer, with Bush in command.
Peak trump came in late August.
And now Rubio is surging. But so is "I don't know," among a group of people one would think don't offer that answer very often. I feel the same; I have rarely felt so uncertain about a major happening in American politics.