the judge

If the political rival is a party in the suit, as opposed to an attorney, it is best for the judge to be recused. More details would be needed to determine whether recusal was necessary, however, if it would create an appearance of inpropriety, recusal is required.

Recusal or judicial disqualification.

It depends on whether it means "to decline something" or "trash". Refuse (ree-FUZE)==confuse Refuse (REF-yoose)==goose
reuse, confuse, reduce and that's all I can think of.
confuse