This isn't a "real" or "pure" 50-state poll-- IIUC, then like Morning Consult from a few weeks ago, it uses a technique called MRP to model characteristics of voters across the country, and then applies that model to its entire national sample to make predictions for each state.
That's why there's no sample size per state-- because every polled voter has a small effect on every state (which of course varies from state to state, depending on the characteristics of the voter).
Very interesting.Morning Consult attempted to give MOEs on theirs. This one, not so much.