That lack of “I shouldn’t do this, it isn’t right” circuitry is what makes a democrat.
To some extent all politicians have a sense of entitlement and immunity from the effects of bad behavior because they are part of the elite ruling class.
At least with Republicans they probably know it is wrong because of their upbringing, but the Demrats simply believe they are morally superior and haven’t any obligation to behave as mere members of the hoi polloi.