<Dl> <Dd> A mutant and expert tracker with super agility, reflexes, acute senses and enhanced strength . In preparation for the role, Stewart gained 50 pounds and grew his hair much longer than its usual length . </Dd> </Dl> <Dd> A mutant and expert tracker with super agility, reflexes, acute senses and enhanced strength . In preparation for the role, Stewart gained 50 pounds and grew his hair much longer than its usual length . </Dd> <P> Additionally, Famke Janssen and James Marsden reprise their roles as Jean Grey and Scott Summers / Cyclops respectively in cameo appearances . Lucas Till reprises his role as Alex Summers / Havok . Evan Jonigkeit portrays Mortimer Toynbee / Toad . Gregg Lowe portrays Eric Gitter / Ink . X-Men comic - book writers Len Wein and Chris Claremont appear as United States congressmen . Michael Lerner plays Senator Brickman . Mark Camacho portrays U.S. President Richard Nixon . Singer cameos as a man with a small film camera as Magneto walks away after Mystique's escape in Paris . In a post-credits scene, Brendan Pedder portrays the ancient mutant, En Sabah Nur . </P> <P> Producer Lauren Shuler Donner stated in August 2006 that a continuation of the X-Men main film series would require a renegotiation . New cast members of X-Men: The Last Stand were signed, while the older cast members were not . Donner said, "There is forty years worth of stories . I've always wanted to do' Days of Future Past' and there are just really a lot of stories yet to be told". She later pitched the idea of a fourth installment of the X-Men franchise to director Bryan Singer, following the completion of the 2011 prequel X-Men: First Class . In March 2011, Donner said the film was in "active development at Fox"; she said, "We took the treatment to Fox and they love it...And X4 leads into X5". </P>

Who played nixon in days of future past