Due to how the US Presidential election works, however, many articles with a partisan tilt will necessarily be in favor of one person and against another person. So think you should also factor frequency into this.
Does someone post one progressive, anti-Trump news article a week? Or a conservative anti-Biden article? Particularly from reputable sources? I would say that should be allowed, even if they don’t give equal time to the other side.
OTOH, someone who posts several anti-Trump (or anti-Biden) articles every day is likely digging down to some questionable sites to find the content. Such a person should be given a temp ban, and advised to go touch some grass. Someone who manages to give a balanced approach to news, though, while using reputable news sources, might possibly get a pass for the lack of a social life.