Democrats yesterday attacked President Bush's new plan to send more U.S. troops to Iraq and began laying the groundwork for a showdown between the executive and legislative branches over war powers. "Escalation of this war is not the change the American people called for in the last election," Democratic Whip Sen. Richard J. Durbin of Illinois said last night in his party's response to Mr. Bush's prime-time presentation of his Iraq strategy changes. "Instead of a new direction, the president's plan moves the American commitment in Iraq in the wrong direction." The new Democratic-led Congress plans to grill Bush administration...