The challengers of President Donald Trump's executive order restricting immigration have made “a reasonably strong” case that Trump's tweets and comments are legally fair game, former Obama administration U.S. Solicitor General Donald Verrilli Jr. said.

Verrilli, now a partner at Munger, Tolles & Olson, is no stranger to defending a litigating position in the face of apparently contradictory statements from a U.S. president. Still, his experiences, he said, were materially different from what Trump's Acting Solicitor General Jeffrey Wall may face in the U.S. Supreme Court.

“I recall two instances that arose in my tenure,” Verrilli said in an interview this week.