>The law allows the U.S. intelligence community (most notably the NSA) to conduct “targeted surveillance” of people outside the U.S. with the “compelled assista

>The law allows the U.S. intelligence community (most notably the NSA) to conduct “targeted surveillance” of people outside the U.S. with the “compelled assistance of electronic communication service providers,” when a government court deems it necessary for national security reasons. How "compelled"? Would the government be able to force, say, Signal to do a MITM against some of their users?