Divided States of America (The Galaxy Series Book 3)

The year is 2032. After traveling to a galaxy far far away, the three astronauts are back on Earth, but in the future. What they see shocks them. When they left Earth in 2015, America was united, but they come to a divided country.
 
The only way to stop this from ever happening is for them to travel back to the year 2015. And the only person who can take them back is the alien who flew back with them. They have already witnessed the powers he possesses. They know that no human on Earth can do what he can.  
 
Will he do it?