Acting Chief of Staff Mick Mulvaney said it is President Trump's decision whether he keeps Rudy Giuliani as his personal lawyer.
"In light of the depositions that we've heard, do you believe that Rudy Giuliani's role as an outside adviser to the President is problematic?" a reporter asked at a news briefing.
"That's the President's call," Mulvaney said.
Some context: US Ambassador to the European Union Gordon Sondland today testified that he was directed by Trump to work with Giuliani on Ukraine and was left with a choice: abandon efforts to bolster a key strategic alliance or work to satisfy the demands of the President's personal lawyer.
Mulvaney said Giuliani's involvement is not illegal.
"You may not like the fact that Giuliani was involved. That's great, that's fine. It's not illegal, it's not impeachable, the President gets to use who he wants to use," he said.