Truthseeker,
...Trump wants a human mission to Mars to be completed within his presidency.
Doing it within his presidency is a surefire recipe for disaster. Four years, even eight, is not enough to get all the bugs ironed out. Too many things can go wrong. An ordinary ship would take 3 years but, if we have the balls to build it, a pulse nuclear spaceship would do it in months.
You need stepping stones before you take a loooong trip like that. Before we go to Mars we should build a Lunar station capable of hosting a pulse nuclear ship (You don't want that thing going back and forth from Earth!) and set up with a small industry to supply the ship. Oxygen from the aluminum oxides in lunar soil as well as aluminum itself for construction. Water can be taken from the deep craters in the lunar north pole.
It is from there that we can go to Mars. One step at a time. That will probably take 20 years to be on the safe side of things.
https://youtu.be/DSK_mymJvkM