The Roman emperor Caligula once mocked the Roman Senate by making a horse - he named Incutatus - a senator.

Did Caligula really make his horse a consul? - Ask History

And now we have Grump, mocking the investigation of the Russian voting interference scandal by inviting the Senate to question his 11 year old son Barron.

Donald Trump Isnt Taking Russia Investigation Seriously, Invites Senate to Question 11-Year-Old Barron Trump