From 2020 forward, the only Republicans who win elections will be those the Democrats allow to win. The Democrats will need token opposition. From time to time it may appear that the Republicans have the upper hand, but the Democrats will always be in control.
When we see the occasional Republican win in a solidly Democrat state like Maryland or Massachusetts, it is because the Democrats want to deflect some blame for their policies and maintain a veneer of a two party system. So a moderate to liberal Republican like Larry Hogan is not going to damage socialistic, green, and deviant initiatives too much, especially with legislatures controlled by the Democrats.