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Internal Revenue Service Commissioner John Koskinen eats a money cookie after speaking during a luncheon at the National Press Club March 24, 2016 in Washington, DC. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

Internal Revenue Service Commissioner John Koskinen eats a money cookie after speaking during a luncheon at the National Press Club March 24, 2016 in Washington, DC. / AFP / Brendan Smialowski        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)