Neither was tariffs
Untrue, Congress gave that power over to the executive branch.
By what legislation?
19 U.S.C. § 1862, 19 U.S.C. §§ 2251–55, 19 U.S.C. §§ 2411–20, 19 U.S.C. § 2132, 19 U.S.C. § 1338, and 50 U.S.C. §§ 1701–10
https://www.congress.gov/crs-product/R48435
Wrong question, it was by inaction and not doing their jobs.
That's my point, they didn't give the power to the presidency. The presidency is arrogating power to itself without regard for legality.