+0

Some Democrats, including major bank critic Senator Elizabeth Warren of Massachusetts, have also argued a 2018 bank deregulation law is to blame.

From Reuters.

What does the adjective "major" modify in the NP "major bank critic"? Is it "bank" or "critic"?

+0

It's ambiguous.

Maybe if you've been following the career of Warren and/or if you know what's in the 2018 law, you might be able to disambiguate it, but on the face of it, it's grammatically ambiguous.

CJ