The Emergency Economic Powers Act doesn't authorize a president to declare an emergency to counteract foreign tariffs that retaliate for his own tariffs, but it's a sufficiently close question that Congress should change the law to limit the power.
Prof Buchanan argues that the baseline problem renders even conventional takings (appropriations rather than regulations) an arbitrary and thus political concept.
Prof Segall says that the Sen. Sheldon Whitehouse et al brief in the NY gun case in SCOTUS might be tactically unwise but oughtn't to be causing the angst it has caused, because its legal realist take is right.
I offer some unsolicited (but not unwelcome, I hope) advice to new law students.