There have been calls for some of the thousand-plus former federal prosecutors who signed the letter saying the evidence supports indictment, to testify before the House. In the statement, they went into detail on the fallacious 'can't be obstruction without an underlying crime' claim, of course, and could presumably make that information more accessible to the millions of Americans who (regrettably) don't do much reading. Former prosecutors taking that oath and testifying might get through to those not paying much attention.
... All of this conduct — trying to control and impede the investigation against the President by leveraging his authority over others — is similar to conduct we have seen charged against other public officials and people in powerful positions.
... As former federal prosecutors, we recognize that prosecuting obstruction of justice cases is critical because unchecked obstruction — which allows intentional interference with criminal investigations to go unpunished — puts our whole system of justice at risk. We believe strongly that, but for the OLC memo, the overwhelming weight of professional judgment would come down in favor of prosecution for the conduct outlined in the Mueller Report. ...
https://medium.com/@dojalumni/statement-by-former-federal-prosecutors-8ab7691c2aa1
Over a thousand of them (1,005 as of three days ago). There must be some setting that would dramatize those numbers. Something that would get through to the independents, mealy-mouthed middle and fence-sitters.
Plus.. I never understood the "underlying crimes" argument. The investigation yielded 34 indictments. Those are crimes. Trump wasn't the only one being investigated.
It's interesting that the phrase "underlying crimes" is trotted out only with respect to Trump himself - as in 'you can't charge him with obstruction of justice, no matter how clearly he was obstructing justice, unless you can indict him for __________!' With the blank filled in by 'collusion' or 'conspiracy' or 'signing a blood oath to be Putin's lackey forever' or whatever the speaker sees as 'stuff they'll never get Trump on.'