There's such a dense pack of scandals that some of them have already passed beyond notice. As for the rest of them... people are getting tired....
Is that how it works? Something else that might happen is a swirling amorphous feeling that there are scandals everywhere, the administration is scandal-plagued, and everything about government falls into disrepute. There's nothing to expose or solve anymore. Everyone becomes cynical and dismissive and won't even listen to the explanations or pay attention to any specific facts and answers that might emerge.
Ah! They're all a bunch of crooks!
Of course, Republicans are hoping people will end up with the opinion The Democrats are all a bunch of crooks!