[BroJoeK]

DiogenesLamp quoting Maryland's song:

"The despot's heel is on thy shore, Maryland!
His torch is at thy temple door, Maryland!
Avenge the patriotic gore
That flecked the streets of Baltimore,
And be the battle queen of yore,
Maryland! My Maryland! "

The fact is that Maryland's legislature voted four-to-one against secession in April 1861.
After Confederates declared war against the United States, only one-third of Maryland's legislators were considered pro-Confederate traitors.
Marylanders served in the Union Army about two-to-one over the Confederate army.

So Maryland was a Union state by law and by its citizens' sympathies.
That makes those who supported the Confederate cause traitors to the United States, regardless of their later propaganda prowess.

[DiogenesLamp]

The fact is that Maryland's legislature voted four-to-one against secession in April 1861.

Was this before or after Lincoln locked up all the ones in favor of it?

Marylanders served in the Union Army about two-to-one over the Confederate army.

You suggest a lot of significance with a bit of data like this, but was not Maryland occupied by Federal armies at the time? Wasn't it more likely that the men of Maryland would be pressed into service by the Union and only Volunteers who could leave the state would join the Confederacy?

It was a lot easier to get into the Union army from Maryland than it was to get into the Confederate army if you were in Maryland.