Well just because Tanya Chutkan was the judge in the 2020 elections case doesn't mean she's biased against Trump. In fact amid all the efforts from Trump's lawyers, Trump pleaded "not guilty" to the case.
https://www.reuters.com/legal/trump-face-familiar-judge-criminal-case-over-2020-election-2023-08-02/
https://www.nbcnews.com/politics/donald-trump/trump-arraigned-indicted-2020-election-rcna97774