By the way, as an open seat, MD-03 was shockingly uncompetitive this year. Yes, everything was aligned for good Democrat results, including the sitting rep running for Senate, the retiring senator's sun running for the House, and overall a good environment for the Democrats; but for the Republicans to fail to field a viable candidate and to only take 33% of the vote indicates that the mapmakers knew what they were doing when they drew this seat.
The GOP didn't even try to take that seat; I guess the party preferred to concentrate on the governorship and open Senate seat. The first I heard of the GOP talking about the MD-03 was on the week prior to the election, and obviously it was merely disinformation to see if the Democrats would get distracted from the gubernatorial and Senate races.