“Jamie Dimon gets kid-glove treatment from Senators,” the front-page headline in Politico screamed after the JPMorgan Chase CEO testified and was questioned by the Senate Banking Committee late last week.

Fast forward to this week. Politico's Kate Nocera and other Beltway scolds are warning the House Financial Services Committee not to give Dimon such “kid glove” treatment when he testifies in the other chamber Tuesday...