WASHINGTON - President Donald Trump is musing about putting solar panels on his proposed wall on the Mexican border.

  

Trump is suggesting at a rally Wednesday evening in Iowa that a solar wall would "create energy and pay for itself."

  

He then joked it would mean Mexico "will have to pay much less money" to build it. Trump claimed as a candidate that Mexico would fully fund his impenetrable border wall - a plan Mexico rejected.

  

Trump also suggested the panels would make the wall "beautiful" and then praised himself by saying, "Pretty good imagination, right?"

  

The wall, which was a signature campaign promise, has not been at the center of the White House's agenda. Construction has not begun.