By showing that negotiations with the United States were a waste of time, Trump will be handing a huge victory to the Iranian hardliners who opposed the agreement. He will basically have proved them right.

Re-imposing sanctions means Iran has less to lose by resuming its nuclear weapons program. This is a dangerous move that makes nuclear proliferation more likely. It's also a remarkably stupid thing to do, as the United States would be throwing away its leverage over Iran and getting nothing in return.

For someone who blabs about deals so much, Trump obviously doesn't understand how they are made. You need to offer the other party something they want; you can't simply rant and rave and expect to get your way.

Here's hoping congressional Republicans do the responsible thing for once, and ignore the wishes of the incompetent halfwit in the White House.