New Jersey Republican Tom Kean Jr. called for the resignation of Defense Secretary Donald H. Rumsfeld on Sunday, days after a new poll showed the Iraq war was hampering his U.S. Senate bid. Kean joins a growing chorus of federal lawmakers, mostly Democrats, in calling for a change in leadership at the Pentagon. Senate Democrats could force a no-confidence vote on Rumsfeld this week. "Donald Rumsfeld has to go," Kean said Sunday, between campaign stops at the Jersey Shore. "This is something I've been thinking about for months." Kean said he has become increasingly frustrated over the Bush administration's handling...