Why is TACO attacking Iran now?

Some ideas...
Failing poll numbers?
"Now that Obama’s poll numbers are in tailspin – watch for him to launch a strike in Libya or Iran. He is desperate." ~Draft Dodging Don, 2012

So he can get elected again?
"Don't let Obama play the Iran card in order to start a war in order to get elected--be careful!" ~Draft Dodging Don, 2012

To "save face?"
"I predict that President Obama will at some point attack Iran in order to save face!" ~Draft Dodging Don, 2013

To show "how tough he is?"
"Remember what I previously said--Obama will someday attack Iran in order to show how tough he is." ~Draft Dodging Don, 2013

Because he is "not skilled"?
"Remember that I predicted a long time ago that President Obama will attack Iran because of his inability to negotiate properly-not skilled!" ~Draft Dodging Don, 2013

President Obama ended his two terms in office without initiating or ordering any military attack on Iran.
And in fact we had an agreement to limit and monitor Iran's nuclear program,
which even Trump's own aides said was working, and he blew it up because it was negotiated under Obama, and Trump doesn't like Obama because Trump is a birther (racist).