Many American schools have little choice. If they lose a substantial fraction of their students (especially rich international students) for a year, they may very well have to close, or at least decimate their programs.
Let it be. Lay off admins, restructure their loans, Stop building new buildings, lower costs, and use their endowments to fund the difference. And get rid of some programs
That'd be okay with me. The reality is, though, that rich donors call the shots. Nothing happens without their say-so.