It’s not a “bias” to believe the Constitution doesn’t contain a right to privacy that protects abortion. That’s just being able to read. Pretty much nobody seriously believes in the logic underlying Roe. It’s the Lochner of left-wing jurisprudence. Even Ginsberg criticized the case, and offered a different justification for abortion rights. At this point it’s just stare decisis and ideology sustaining the precedent.

Accusations of “bias” and “preconceived opinion” are absolutely hilarious coming from the left. Republican judges regularly get wobbly and vote for the liberal position (Obergefell, Bostock, Woman’s Health. The liberal judges, however, always vote party line in these cases.)