In a withering critique of the Bush administration, former Vice President Al Gore on Sunday accused the president of betraying the country by using the Sept. 11 attacks as a justification for the invasion of Iraq. ''He betrayed this country!'' Mr. Gore shouted into the microphone at a rally of Tennessee Democrats here in a stuffy hotel ballroom. ''He played on our fears. He took America on an ill-conceived foreign adventure dangerous to our troops, an adventure preordained and planned before 9/11 ever took place.'' The speech had several hundred Democrats roaring their approval for Mr. Gore, the party's 2000...