Yes, Lincoln suspended that pesky Writ of Habeas Corpus, as well as the First, Fourth, Fifth, Sixth, Ninth and Tenth and possibly the 8th amendments.
And, of course, if his theory for pursuit of the war was valid, he violated Article 4, Section 3 as well. Lincoln is not the poster child of a constitutional scholar.
Of course, under the Confederate theory of government, state enacted gun bans might be legal under a theory of state's rights, although Art I, Sec 9, Para 13 of the Confederate Constitution tracks the 2nd Amendment of the U.S. Constitution.
That pesky Article I says the writ can be suspended if in times of invastion or insurrection the public safety requires it. As for the others, how about some specifics.
And, of course, if his theory for pursuit of the war was valid, he violated Article 4, Section 3 as well.
Hardly. The Virginia legislature, that part not participating in the rebellion, authorized the creation of West Virginia.