It is not a mathematical impossibility. That part is about all that is true. But it is so unlikely as to be obvious to all but the delusional at this pont.
...and as to most GOP states being winner take all...I believe that most of the ones left are proportional when taken as an entire state. Maybe winner take all by precinct, congressional district, or county...but not at all by state. Almost all of those have already voted.
>> delusional <<
Name-calling hardly makes your argument.
It was pointed out on one of the 'After Primary" wrap-up shows, that you are correct. For all the same reasons. The sentence in the article above, concerning the remaining republican primary states are mostly winner take all, is incorrect.