It's challenging but doable. Assuming only 1 or 2 CDs worth of delegates from Wisconsin, he needs to:
1. Overperform in NY and finish well into the 80's with its pledged delegates.
2. Sweep the rest of the NE, including Maryland (he can afford to lose the 2 CDs closest to DC to Kasich, but no more).
3. Win Montana or romp Arizona/Nevada style in California.
Right now, the first two look more likely than not. It's the 3rd part that could sink him. Also, if he wins decisively in PA, he should be able to get 20ish of their unpledged CD delegates to come around in the event he's short of a majority.
The areas he did the best in Idaho and the Wyoming convention suggests that Trump could win Montana.
