Senate Parliamentarian Elizabeth MacDonough during the first Trump administration. Photo: J. Scott Applewhite/AP Photos This is a pretty big week in American politics. On Tuesday we’ll see the first special and off-year elections of the second Trump era , and on Wednesday Trump will impose a wide array of new tariffs (an event he calls Liberation Day). But a little-known decision could soon dwarf those important developments in long-term significance. Senate Parliamentarian Elizabeth MacDonough