MSNBC's Joe Scarborough on Monday singled out Stephen Miller, saying President Trump's senior adviser had gone on a "power trip."

"Why did Stephen Miller fight so hard to put out this order on Friday without talking to any of the other agencies?" Scarborough asked Monday during MSNBC's "Morning Joe," referring to the president's immigration executive order.

"It was Stephen Miller sitting in the White House saying, 'We're not going to go to the other agencies. We're not going to talk to the lawyers. We're going to do this all alone,'" Scarborough continued.

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"You've got a very young person in the White House on a power trip thinking that you can just write executive orders and tell all of your Cabinet agencies to go to hell."

Scarborough said Washington is in an "uproar" this morning because Miller decided "he was going to do this without going through the regular agency process."

The president on Friday signed an executive order that bars Syrian refugees indefinitely and halts the United States' refugee resettlement program for four months.

It also denies entry for 90 days to people from seven predominately Muslim countries: Iran, Iraq, Yemen, Somalia, Sudan, Syria and Libya.

Hours after the order was signed, reports emerged of people being detained at airports upon arrival to the U.S. and new details continued to surface about the exact scope of who would be impacted by the order. Protests broke out in cities across the countries as Trump officials sought to clarify parts of the order.

Scarborough blasted the administration for not explaining the order to the media and not vetting it with the agencies.

"The president's feeling was, 'This is what I promised people I'd do,'" Scarborough said.