CNN is reporting that a Senator has collapsed at the Congressional Luncheon celebrating the inauguration of President Obama. It may have been Sen. Robert Byrd, but that is not yet confirmed. Other reports suggest that it was Sen. Ted Kennedy. No one seems to be sure which senator it was. We’ll update when we know more. Update: NBC says that Sen. Robert Byrd (D-W. Virginia) suffered a medical emergency and was taken to a…