This represents not only a completely baseless accusation, but a dangerous line in the sand. Not because he's suggesting prosecuting someone for what they did as President; that's disturbing enough. But because he's suggesting prosecuting Trump for effectively nothing at all. Remember, Weissman had his chance to convince Mueller to bring obstruction of justice charges. He failed. He had his chance to convince Barr and Rosenstein, and he failed. He wrote a report to convince the public, and he failed. And now he wants to criminally prosecute someone for vigorously defending themselves within the public sphere.