Trump is probably on the list, so he has to protect that. The Democrats had it during their entire presidency; even if they didn’t want turmoil during their time in office, they could have released it after their presidential defeat and before Trump took office.
Your premise is wrong. The Democrats never had the list, and the Republicans don’t have it now. The people who actually have that list, and those documents, have names. Use those names. Don’t trick yourself into believing that some random congressperson has access or authority.