Maryland political registration:

Party       Number of Voters       Percentage

Democratic 2,059,544             54.9%
Republican 1,020,438             26.0%
Unaffiliated 691,583             17.6%
Libertarian    20,377               0.5%
Green          9,313               0.2%
Other          31,975               0.8%

Total       3,928,689             100%

So, if EVERYONE else supports Trump, that means that at least 39,131 Dems in MD support Trump as well.