partisan hack - Robuta Search

https://www.theblaze.com/news/cnn-hires-former-cnbc-reporter-who-coordinated-with-the-clinton-campaign

As partisan as it gets

https://www.urbandictionary.com/define.php?term=Partisan%20Hack

Partisan Hack: Someone who cares more about supporting a particular party or ideology than supporting what is morally right, or factually true.