In what way?
His links to financial services & real-estate megadonors?
https://www.opensecrets.org/members-of-congress/mark-warner/summary?cid=N00002097&cycle=2024&type=C
His overweaning ambitions to be president himself?
https://www.cnbc.com/2018/06/08/democratic-donors-push-mark-warner-to-run-in-2020.html
His links to a corrupt corporation like BlackRock?
https://www.opensecrets.org/news/2014/06/mark-warner-and-blackrock-its-complicated/
His anti-union stance?
https://www.facingsouth.org/2021/04/institute-index-democratic-senator-virginia-blocking-key-pro-union-bill