Why did president lincoln call for martial law and suspend citizen's rights in the borders states during the civil war?

Abraham Lincoln, was desperate to prevent Maryland from joining the Confederacy (by force, if necessary), as such a turn of events would surround the Union capital of Washington, DC with hostile territory. The day after "Maryland, My Maryland" was first published, Lincoln suspended the writ of habeas corpus in Maryland. Subsequently, as Virginia's secession from the Union became imminent, Lincoln sent the Union Army to occupy Annapolis and Baltimore, and declared martial law.

No , abraham lincoln is elected 16th president of the united states over a deeply divided democratic party, becoming the first republican to win the presidency . lincoln receive 40 % of the popular vote handily defeated three other candidates