The story of Jurgen Klinsmann during his US tenure is a mixed bag. You can't conclusively say that he's got to go or that he's got to stay. There needs to be more time.
They've got a foundation for something good to go on. But they've also had baffling inconsistency and 2015 was a pretty bad year for the program. They've suffered setbacks following their strong World Cup performance.
Re-making the US into a soccer power on the likes of Portugal, Brazil, Spain, et cetera isn't easy. Things are inherently going to be different for the US than for other countries. So Jurgen's got a very difficult job to do making this team elite.
Let's see what happens after 2018. Then we can see whether he remains the right man or not. Let the guy coach out his contract because right now, I'm not sure who we could get that could do a better job. If you were going to fire him, you should have fired him last year. The seat's cooled off since then.