Let's see. Trump just won what? Four out of five? Five out of six? Fifteen of the total? So how the hell do you come up with 'the anti-Trumps are a much larger contingent that the pro-Trumps" and 'the antis are increasing"? You're down to Kasich and Cruz, and Cruz ain't really one of yours. Rubio is toast. Gonna draft Romney? Take your 25% and walk? Who cares!
Trump can't command a majority; his wins have come because he's won a plurality of votes. Even as candidates have dropped out, their supporters aren't going to Trump. Roughly speaking, two thirds of the GOP electorate opposes Trump, but until the field is further winnowed, he will continue to win delegates.
It seems clear that the results yesterday will cause Rubio to drop out, possibly throwing his support to Kasich or Cruz. Heck, if he were to throw his support to Cruz, Cruz would have as many delegates as Trump does.
With three left in the race, it will be far easier to clear a path to denying Trump a first ballot nomination. This race is going to be decided on the convention floor.