1. Because impeachment is a matter of the highest national concern; 2. And should be about searching for the truth wherever it leads; 3. If Trump did no wrong as all the Republicans say — then where is the need for stonewalling? 4. ACQUIESCING TO CLAIMS OF EXECUTIVE PRIVILEGE THIS BROAD WOULD SET A TERRIBLE PRECEDENT FOR HOLDING FUTURE PRESIDENTIAL ADMINISTRATIONS ACCOUNTABLE. 5. LAST BUT NOT LEAST: THE TRUTH HAS A WAY OF COMING OUT EVENTUALLY, REGARDLESS OF THE RULES PICKED BY THE SENATE.