Question

Why was Lincoln determined to keep Maryland from seceding? What did he do to keep the state from seceding? Why was this controversial?

Answer 1

Why Lincoln was determined to keep Maryland in the Union
- Geography and the capital: Maryland surrounds Washington, D.C., on three sides. If Maryland seceded, the capital would be isolated inside Confederate territory and indefensible.
- Transportation and communications: Baltimore and Maryland’s rail/toll routes and telegraph lines were vital links between the North and Washington. Losing them would hamper moving troops and supplies.
- Political and military balance: keeping the border slave states (Maryland, Kentucky, Missouri, Delaware) in the Union limited Confederate manpower and legitimacy and helped keep Northern public opinion and some border-state sympathies from shifting.

What Lincoln did to keep Maryland from seceding
- Military occupation and troop deployments: Federal troops were sent into Baltimore and other strategic points immediately after the outbreak of hostilities (notably after the April 19, 1861, riot in Baltimore). Troops secured rail lines, bridges and telegraph lines to keep Washington supplied and connected.
- Preventing a secession vote: Lincoln’s administration used arrests and detentions of pro-secession leaders, state militia officers and others to deny the Maryland legislature or convention the quorum or freedom to act on secession.
- Suspension of habeas corpus and martial-law measures: Lincoln authorized military authorities to suspend the writ of habeas corpus in areas where public safety required it (initially along key rail routes and later more broadly). One high-profile case was the military arrest of John Merryman (May 1861), which led to Chief Justice Roger Taney’s Ex parte Merryman opinion. Lincoln’s administration largely ignored Taney’s ruling. Congress later codified suspension authority in the Habeas Corpus Suspension Act (March 1863).
- Suppression of secessionist press and public agitation: Military authorities shut down pro-Confederate newspapers and arrested editors and agitators in Maryland to prevent organized secessionist action.
Overall effect: through a combination of troops, arrests, communications control and pressure on local officials, Lincoln’s government kept Maryland from joining the Confederacy.

Why these actions were controversial
- Constitutional and legal questions: Critics argued the President lacked the constitutional authority to suspend habeas corpus, to order arrests without judicial process, or to use the military to interfere with state political processes. Chief Justice Taney’s Ex parte Merryman opinion held that only Congress could suspend the writ. Lincoln and his supporters argued that extraordinary measures were justified by the emergency of rebellion and his powers as Commander-in-Chief to preserve the Union. Congress later ratified suspension of the writ by statute.
- Civil liberties and precedent: Arresting civilians, closing newspapers, and detaining legislators without due process raised alarms about executive overreach and the erosion of civil liberties. Opponents called Lincoln a dictator or tyrant; some Northern Democrats and civil libertarians condemned the measures even as many Unionists accepted them as necessary.
- Political balance: The actions alienated some moderates and inflamed Southern sympathizers; they also created lasting debates about the balance between security and liberty in wartime.

Bottom line: Lincoln judged Maryland’s loyalty indispensable to the survival of the Union capital and the Union war effort. To prevent secession he authorized military occupation, arrests, suppression of secessionist activity and suspension of habeas corpus — measures many contemporaries and later critics saw as necessary emergency steps, while others saw them as unconstitutional and dangerous precedents.