An ABC News-Washington Post tracking poll released Sundaysuggested the presidential race had tightened slightly after FBI Director James Comey told Congress about new emails possibly related to Hillary Clinton’s private email server. The poll, conducted partly before and partly after Comey’s Friday revelation, showed Clinton’s lead over Republican nominee Donald Trump narrowing to just 1 percentage point nationally, down from 2 points just before Comey’s letter and 12 points a week earlier. Trump has gained as more Republicans rally behind him. Other polls have shown the race tightening in key battleground states, although a new CBS tracking poll of likely voters in 13 swing states found that 71 percent said Comey’s letter either wouldn’t change their minds, or they had already voted.