I don’t see any corroboration about campaign contributions.
There are literally over a hundred Amy Coopers in New York state, so without more info, it’s hard to pinpoint her as the Amy Cooper of the FEC records. As someone involved in fund management, it’s doubtful her social media pages would have leaned one way or another, because clients aren’t thrilled at that kind of thing.
I went to OpenSecrets and found the ones the article apparently refers to.