Rove Watch clock: 78 days.

Former White House adviser Karl Rove appeared on Fox News’s O’Reilly Factor tonight to assess the results of the Pennsylvania primary, commenting on the performance and prospects of Sens. Hillary Clinton (D-NY) and Barack Obama (D-IL). Once again, O’Reilly failed to identify Rove’s ties to Sen. John McCain’s (R-AZ) campaign, marking the 78th day since Rove became a Fox contributor with no disclosure.