6 states siding against a supreme court decision to deny access to federal authorities seems big, if thats happened in my lifetime I've not heard of it before
6 states siding against a supreme court decision to deny access to federal authorities seems big, if thats happened in my lifetime I've not heard of it before
Just anecdotally as an American in the South, Midwest or Great Plains (try and find me now FBI): In other circumstances you definitely can use I've in American English, like "I've been waiting," and "I've not" doesn't sound unnatural to me, just a little stuffy, but "I haven't" is for sure more common.