were involved in previous cases on a partisan basis. The MISC judges were not so "compromised" on this issue to be brought before them. No conflict of interest.
Perhaps to recuse or not to recuse may be a point of view for people to argue the finer perspectives of merit, however if these judges did not remove themselves then it is arguable that there has been a conflict of interest in the first place if they are still being considered for the USSC.
That said, had they stayed in the decision that would benefit Trump it will argued by dems in senate confirmation hearings (should either one make it this far) that they are partial, this has now been removed.
It was the right thing to do.