Harry Enten does delegate math:
I expect Mitt Romney to win all the delegates in Connecticut, Delaware and New York for a total of 134, plus another nine delegates in Rhode Island's proportional primary. Romney should eventually win most, if not all, the delegates in Pennsylvania, but there is no real relationship between tomorrow's Quaker state popular vote and delegate count. Newt Gingrich and Ron Paul should win three or four delegates each in Rhode Island.
First Read will be watching Romney's share of the vote:
[T]his is the first primary day where Romney doesn’t face any real competition. So when we watch the returns, we’ll get a good idea of the true anti-Romney vote tonight. Does he get at least 50% in all of these contests? What about 60%? 70%?
The Dish 