QUITO (Reuters) - A knife attack in Ecuador that killed two government supporters was perpetrated by a man under the influence of drugs and alcohol and was not politically motivated, President Rafael Correa said on Tuesday. The man killed two Correa supporters and injured five more at a campaign rally on Monday, about two weeks before a presidential election that the leftist leader is expected to win comfortably. "There is no indication that this attack may have been politically motivated. ...