Donald Trump.

"I'll tell you the whole history of it," Giuliani said, as transcribed by The Washington Post. "So when (Trump) first announced it, he said, 'Muslim ban.' He called me up. He said, 'Put a commission together. Show me the right way to do it legally.'"

[1]http://www.cnn.com/2017/02/06/politics/trump-muslim-ban-trav...