The first approach would be to present an untenable choice. Republicans can decide maybe they should have hearings and consider the emoluments problem after all. Mind you, the president can stay president — or he can keep his foreign earnings. Not both. Likewise, Republicans can pass by veto-proof majorities a requirement for presidents to release their tax returns before the 2020 election. Hey, Trump can stay president and run again — or he can keep his tax returns secret. Not both. Then there are the nepotism laws. Perhaps they need to be clarified and strengthened. Beginning in, say, 2018, no presidential child, sibling or spouse can have an official job title, a White House office or a security clearance. Trump can stay, of course. But he'd have to operate without Jared Kushner and Ivanka Trump at his side. He can be president - or he can keep his children close to help him through his work. Not both.