In all fairness i dont think space exploration will have any benefit to mankind at all, He should divert the resources to tackling crime and to education, those are needed above all. Unless NASA finds a planet entirely made up of Gold or Diamond, funding to Space Exploration should be cut.
Do you have any idea how much technology developed through the space industry has filtered down to every day use?
Inc. medical, fire fighting equipment, motor vehicle tech, satelite TV, GPS, mine clearing tech the list goes on and on.