Maybe the bigger question is why was Obama lying about the breakout time?
check it out:

Bloomberg’s Eli Lake reports Tuesday that the Obama administration kept secret until the beginning of April Iran’s two to three month breakout time for a nuclear weapon, saying “the administration only declassified this estimate at the beginning of the month, just in time for the White House to make the case for its Iran deal to Congress and the public.”

Energy Secretary Ernest Moniz, speaking to reporters on Monday, said that the administration has held this assessment for “quite some time.” Lake says that Brian Hale, a spokesman for the Office of the Director of National Intelligence, confirmed Monday “that the two-to-three-month estimate for fissile material was declassified on April 1.”