Yes. In the editorial sections, the paper's bias becomes more obvious. The reporting section is overseen by the same people, and the same bias is quite visible to the discerning reader.
That's very true in WaPo's case. They treated Trump extremely carefully, and also published very pro Trump editorials by Hugh Hewitt and Marc Thiessen. Their treatment of Biden, and then Harris, has not been so charitable.
learn a bit of the history of journalism, and specifically of the history of american journalism and its connection to politics and voting, i dare you.