The Supreme Court is not officially a political body, and I somehow doubt it will vote on party lines when it comes to a clear constitutional case.
Rowe vs Wade was not so clear cut from a constitutional viewpoint.
The Supreme Court is not
officially a political body, but is openly and obviously political in practice.
Clear constitutional cases with no political salience get to avoid party lines.
The more politically salient the issue, the more partisan the vote.
That said, the Court wants (mostly) to
appear like it is deciding on legal grounds and has standards.
Again, the question is how politically salient the issue is.
Giving Trump immunity, for instance, was done with basically no regard for how bad it looked.
(Although it seemed Roberts thought he had written a decision that made it look good to the rubes.)
How the Court handles this will be decided by explicitly political decision making.
Note that, "how much further will respect for the court drop" is a political factor in the decision making.
