White House Deputy Press Secretary Sarah Huckabee Sanders said on Thursday that she was forbidden from discussing things that President Donald Trump has written on Twitter.

In a tweet on Thursday morning, Trump accused Special Counsel Robert Mueller of conducting a "witch hunt" after news reports suggested that the president may be under investigation for obstruction of justice.

The White House declined to provide an on-camera briefing to reporters, but Sanders took questions for 18 minutes off camera Thursday afternoon.

When she was asked to discuss the president's tweet, the deputy press secretary reportedly said that she couldn't because "I'm not the president."

Sanders was also asked if the president had faith in Mueller.

"I believe so," she replied.