Is a military agency (the NSA) that is invading our privacy (sort of like invading our homes) in violation of the Third Amendment (https://en.wikipedia.org/wiki/Third_Amendment_to_the_United_States_Constitution)?
Seems unlikely that it would get much traction with SCOTUS these days, but it's an interesting idea.
Could the Third Amendment be used to fight the surveillance state?
California lawmaker proposes an unusual legal theory, but law profs are skeptical.