It is legal for the campaign to pay any legal expenses arising out of the campaign (NPR)
Job growth seems to be strong in one of Washington's specialized professions: defense attorneys for the White House. Investigations by Justice Department special counsel Robert Mueller and several congressional committees are driving the demand. One question is this: Who is paying for all those lawyers?
"It's legal for the campaign to pay any legal expenses arising out of the campaign," said Larry Noble, general counsel of the Campaign Legal Center, a watchdog group. "What's interesting here is that the payment was made prior to any public disclosure of the emails from Donald Trump Jr." — the emails that earlier this month revealed the previously secret meeting.