Politics post
My general critique is that Americans should be very leery to distrustful of drawing conclusions or extrapolating from results in a primary to a general election. Primaries, even high profile ones, have exceedingly small turn out compared to many elections. Most Americans, including very likely voters, are not really paying that much attention. This is also one of the many reasons polling for primaries is an utter failure.
It matters that candidates are being chosen.
Politics post
Also, as a perrenial, exit polls are utter junk and should have been abandoned as a tool decades ago