The fact that Mosley backs Todt is itself reason enough to vote Vatanen.
As Mosley himself boasted, while trying to divide and conquer FOTA, he and Todt struck secret deals which, by his own admission, gave advantages and FIA favour to Ferrari under Todt's leadership.
Though Di Montezemolo had already made this information available to the other FOTA teams after Todt's departure from Ferrari, and FOTA was unaffected by Mosley's "revelations", nevertheless those deals existed through the duration of the last Concorde agreement.
For the very fact that Mosley admits that the FIA could be (and was) bribed, I think that the monopoly on motorsports governance that the FIA has been granted should be under investigation and review by the European Commission that allowed it in the first place.
I'd be very surprised if, IF Vatanen doesn't get elected, he'd not use his influence in the EU to get that investigation under way. And if he doesn't get elected, I'll support and encourage that review.
Vatanen FTW, one way or the other!