US President Donald Trump has fired the director of the FBI, James B Comey, abruptly terminating the top official leading a criminal investigation into whether Trump’s advisers colluded with the Russian government to steer the outcome of the 2016 presidential election. <br /> <br />Senate Minority Leader Charles Schumer (D-N.Y.) says he told President Trump that his decision to fire FBI Director James Comey was a "big mistake."