A prominent ally of Donald Trump has urged him to drop his efforts to overturn his loss to Joe Biden in the US president election.
Former New Jersey Governor Chris Christie called the president’s legal team a “national embarrassment”.
President Trump has refused to concede the election, making unsubstantiated claims of widespread electoral fraud.
Many Republicans have supported his legal efforts but a small but growing number have broken ranks.
On Saturday, Trump suffered a major blow in Pennsylvania, after a judge dismissed a lawsuit from the Trump campaign seeking to invalidate millions of mail-in votes in the battleground state.
But Judge Matthew Brann said his court had been presented with “strained legal arguments without merit and speculative accusations”.
Speaking to ABC’s This Week programme on Sunday, Christie, said: “Quite frankly, the conduct of the president’s legal team has been a national embarrassment”.
Christie said the Trump camp was often discussing election fraud “outside the courtroom, but when they go inside the courtroom they don’t plead fraud and they don’t argue fraud”.
“I have been a supporter of the president’s. I voted for him twice. But elections have consequences, and we cannot continue to act as if something happened here that didn’t happen.”
Christie was the first governor to endorse Trump as a presidential candidate back in 2016.