Last night, I appeared on MSNBC's Verdict with Dan Abrams to discuss Karl Rove's outrageous refusal to appear before Congress regarding serious allegations that he used the US Justice Department to take down a prominent Democratic politician. It is alleged that Mr. Rove personally instigated the prosecution of former Alabama Governor Don Siegleman.  The case has been criticized by legal experts, and 52 former state attorneys general – both Republicans and Democrats –...