HILLARY CLINTON’S reelection campaign for the United States Senate in 2006 may be tougher than expected. On Monday, May 2, the New York Observer reported that Clinton might face a challenge from Richard Nixon’s son-in-law Ed Cox.

Cox, who has declined to make a statement on his intentions, has made steps toward running for Clinton’s New York Senate seat, including launching an exploratory committee. Associates to Cox believe that he will win the endorsement of New York Governor George Pataki.