Acting at the behest of Bill and Hillary Clinton, a senior campaign aide to Gen. Wesley Clark has carried out the "political assassination" of Democratic presidential front-runner Howard Dean, former top Clinton advisor Dick Morris contended late Friday. "I believe we have witnessed a political assassination of Howard Dean by the Clintons," Morris told Fox News Channel's "Hannity & Colmes" - hours after polls showed that Dean's once formidable lead in Iowa had evaporated. Morris named Clark communications director Chris Lehane, a former Gore campaign spokesman who cut his teeth as a key operative in the Clinton White House's attack...