CNN in Japan?

In my country, Japan, CNN is treated as if there were no media without it in the U.S.

For example, when Japanese TV refers to a public opinion poll, almost all Japanese media refers to it conducted by CNN.

However, CNN often criticizes Trump, the American president, and Republican Party, and supports Biden, and Democratic Party I feel. Then, I guess the Japanese media mislead people to criticize Trump. (Japanese medias especially TV tends to dislike Trump, and support China, not on good terms with Trump.) Then, I want to ask Americans some questions below.

1, Is CNN enough dominant in the U.S.to be treated as if there are no media without CNN in Japan

2, Do you think CNN tends to support Biden or the democratic party relative to other media in the U.S.?