From Congressional Research Service:

Specific matters here include, among other things, the question of war powers, the delegation of authority for imposing tariffs, and whether a change in the U.S. role would have any implications for congressional organization, capacity, and operations. 7

7 For additional discussion, see Kevin Kosar, ed., Congress and Foreign Affairs: Reasserting the Power of the First Branch, R Street Institute, 2020, 64 pp.