What the hell happened? All I can guess is Morrisey pissed off Trump somehow behind closed doors but not enough to get him to endorse somebody else in this race. The fact that Justice's endorsement did nothing while he won his own primary handily is quite a spectacle.
Did the other candidate siphon off would-be Capito voters?
It's not as absurd as the past, but the panhandle punches above it's weight in GOP primaries cause of how Republican voters elsewhere in the state may still have Dem registrations. The republicans of those eastern counties are different from the rest of the state - the counties are in the DC media market and look east economically and culturally. Their orientation towards the rest of the mid-Atlantic/beltway is why a few Maryland pols have been able to find an audience across the border.
Almost all of Morrisey's winning margin came from the panhandle. Almost every other part of the state was a mixed bag with multiple candidates receiving viable shares of the vote. There was no clear favorite in the rest of the state.