WASHINGTON -- The executive producer of CBS's "60 Minutes" midweek broadcast, who partially blamed the Bush White House for bogus documents used by Dan Rather, is a former staffer for New York Democrats who was still making political contributions while on the network's payroll. Josh Howard served on the staff of Rep. Stephen Solarz and worked for Sen. Charles Schumer when Schumer was a state assemblyman, a background confirmed by CBS. Federal election reporting records show that Howard, identifying himself as a CBS employee, contributed $1,000 in each of Solarz's last two campaigns for Congress in 1990 and 1992. When...