He knows his rubes will believe any conspiracy theory fed to them.
The murder of Vince Foster
The theft of Clinton Foundation funds
Benghazi
Seth Rich
Pizzagate
Uranium One
Obama's Birth Certificate
Ukrainian election interference
Biden's senility
Kamala Harris' ineligibility
...
They are born gullible. And gullible they remain.
What they don't seem to understand is that because they are gullible, they also have no credibility outside the gullible bubble.