NASA missions

In a country that plays "Star Trek" on TV for fifty years, and flocks to "Star Wars" movies, there are probably votes to be had from space exploration.  Perhaps as many votes as the greenies have for shutting stuff down.  As long as we are funding NASA we ought to ask them to do something for the money.  The last eight years under Obama have been uninspiring.  NASA got it's funding every year and produced little to nothing.  They did manage to spend all the money though.
 Four NASA missions for the future occur to me. 
1.  The Obama mission, draw your pay and do nothing.
2.  The return to the Moon mission.  This is clearly doable, we did it back in the '70s.  Question:  What could we accomplish?  Setting up a permanent moonbase is surely possible, but what would it do?  Mining, manufacturing, hydroponic farming?  Astronomical observatory?  I read as much science fiction as anyone, but I think a permanent moonbase might turn out like the International Space Station, cool, but what does it do? 
3.  The Mars mission.  This could be a toughie.  The flight to the Moon is a matter of days, round trip to Mars is a couple of years.  The lunar mission can carry enough air, water, food, and fuel to last the trip.  A two year Mars mission would have to recycle air and everything else, and grow food in flight.  This means a bigger ship, more equipment and gear,  much higher standards of air tightness.  Plus make a jet landing on Mars, a blastoff back to orbit, and have enough fuel for the return to earth.  None of this is impossible, but it's harder.  The payoff?  It's a first, it will go down in the history books, and we might discover life on Mars.  Even some fossil bacteria would be exciting. 
4.   The asteroid mission.  Fly to the asteroid belt and match orbits with a medium size asteroid.  This is actually easier than the Mars mission.  It doesn't have to land and blast off again which simplifies things a lot.  The time to fly out and back is a little longer than going to Mars, but not that much longer.  Scientific payoff might be high, examination of the asteroid might give important clues to the origin of the Solar system.  And it would be a first, go into the history books. 
   It would pay Trump politically to pick one and get cracking on it.  Long as we are funding NASA we might as well have 'em do something to earn their pay.