This was recently uttered on the 2016 campaign trail:
"We've spent $4 trillion trying to topple various people that, frankly, if they were there and if we could have spent that $4 trillion in the United States to fix our roads, our bridges, and all of the other problems — our airports and all the other problems we have — we would have been a lot better off, I can tell you that right now.
We have done a tremendous disservice not only to the Middle East — we've done a tremendous disservice to humanity. The people that have been killed, the people that have been wiped away — and for what? It's not like we had victory. It's a mess. The Middle East is totally destabilized, a total and complete mess. I wish we had the 4 trillion dollars or 5 trillion dollars. I wish it were spent right here in the United States on schools, hospitals, roads, airports, and everything else that are all falling apart!"