This is not surprising at all. MD and VA both have large populations living in the wealthy DC suburbs. Unlike other suburbs, these areas have always opposed republicans because the source of their wealth is usually related to the government. Trump was doomed to lose them by even larger margins than usual because he he focused on winning the working class instead of the rich. They also are more free to virtue signal with their votes since they face no severe economic hardships. Oh, and the beltway is terribly out of touch with most of America. Even the media now admits it. That's why I knew he wouldn't win VA even as I predicted him winning blue states like PA and WI. Adding elitist white suburbanites and the black vote, you have a clear and overwhelming democratic majority in MD. The eastern part of the state and northwest corner got redder, but not many people live there.
Well aren't you special.