Mud will continue to stick to every minister and MP who supported Johnson through the prorogation lies, partygate, the Paterson scandal, the free school meals about-turn, the wallpaper for favours scandal, the PPE contract waste, killing care home residents, the jobs-for-the-mistress scandal, the Rwanda scandal, Barnard Castle, the covid-contracts-for-mates scandal, the Test and Trace fuck-up and countless other scandals and cock-ups and who claims only now to be shocked by his lack of integrity and honesty.
I don't think it will (sadly).
Partygate will be associated with Boris - it was his "home" and his staff doing the partying. Sunak will find some mud sticking after his fine though.
I think regardless of supporting Boris for as long as they did, you'll get some front runners in the leadership contest who will be perceived to have fairly clean hands.
I think the key battlegrounds are going to be economic policy and defence.
On that basis I see Wallace and Javid (as a former chancellor) as the front runners.