U.S. ambassadors
The veteran foreign service officer was confirmed unanimously by the Senate without a formal roll call vote.
"We understand this sort of thing happens," Australia's foreign minister said.
Johnson first contributed hundreds of thousands of dollars to Jeb Bush, then backed Trump.
The order reportedly threatens to leave the U.S. without Senate-confirmed envoys for months.
WHAT'S HAPPENING
"I think if we’re not visible, then we’re giving up."
Russian news agencies were told McFaul had been added to a sanctions list.
The top U.S. diplomatic spot in Mexico has sat vacant for over eight months.
Before being named ambassador, she was a big fundraiser for President Obama.