Original sentence: The Confederacy was rebelling, thus suspension of habeas corpus was both legal and constitutional-- but only if done by Congress, since the Constitution reserves this power under Article I, which pertains solely to congressional powers; Lincoln, meanwhile, usurped the power under his own executive order
Edited sentence: The Confederacy was rebelling, thus suspension of habeas corpus was both legal and constitutional—but only if done by Congress, since the Constitution reserves this power under Article I, which pertains solely to congressional powers; Lincoln, meanwhile, usurped the power under his own executive order