According to the good people at FiveThirtyEight, Trump is running BELOW his projected target to get the nomination: They took the time to figure out a reasonable path to the nomination for each major candidate, based on their appeal to different groups. Cruz, for example, was supposed to win big through the South, and failed, so he is well below his target, which is currently higher than Trump's. Trump, due to his better than expected performance in the South, was running slightly above his target for a while, but since Ohio, he's fallen slightly below the target. However, not so low as he couldn't fix it with a few small wins. However, the projection is that he misses the goal by a small number (thirty delegates or so).