With Lindsey Graham gone, the U.S. Senate must decide whether to serve the Constitution or the President, writes Thom Hartmann. Graham's death narrows an already thin Republican majority just as a contested attorney general nomination and stalled spending bills hit the floor this week. Whether the bipartisan Ukraine bloc survives him will reveal whether independent senate foreign policy still exists at all. The Republican senators eulogising him this week get to decide whether his career was an aberration or the template for their own individual futures. Americans should be jamming their senators' phone lines this week, making clear which kind of Senate they expect and this time Lindsey Graham won't be there to decide for them.