In a sane world, this would have been enough to disqualify him on the spot

[robkelk]

CBC News Analysis: Brett Kavanaugh exposed his political grudges — now faith in a neutral Supreme Court may be lost for decades

How can this person be expected to be impartial when judging the Constitutionality of laws? He's shown himself to have a bias against a particular political party - that can be held against him if he is asked to judge any bills that were written or moved by that particular party. (And it doesn't matter which political party that is.)

That should have been enough to remove him from consideration then and there.