Easy one. Because the "they" here is the Commission on Presidential Debates -- the same commission that allowed Hillary Clinton in 2015 to be fed the secret questions before the debate ... while her own husband Bill was honorary chairman of the debate commission.
Are you confusing CNN with the Commission on Presidential Debates, and confusing the primary debate with the main presidential debate?
CNN contributor Donna Brazile leaked questions to Clinton in the primary debate against Bernie Sanders. That isn't the same as the later presidential debates under a totally different organization.
The Commission on Presidential Debates is jointly sponsored by both Democrats and Republicans. The primary debates are sponsored by just their own party.
And did you watch the 2016 debate? It was more of a one sided **** show while 2020 was a two sided **** show. Trump likely benefited more from the 2016 one.
Given the number of my virulently anti-Chinese posts, you'll have nearly as hard a time selling that one as you will in convincing people Chris Wallace was an unbiased moderator.
Trump was changed his party five times, was a big NYC billionaire Democrat for decades, flip floped his policies based on political popularity, played the big city politics game for decades successfully, and openly admitted to bribing politicans in the Republican primaries...yet somehow he was sold as the anti-establishment "true conservative" and "real Republican.
So yeh, you can post anti-Chinese posts all you want and you can still be called a Chinese agent. Also, in case you didn't realize it, that was /s and the original comment was a joke.
Unbiased? Nobody is unbiased. You make do with what you have, and what he had was two old kids fighting each other.