While testifying before a Senate budget panel on Tuesday, Deputy Attorney General Rod Rosenstein said he has not seen “good cause” to fire special counsel Robert Mueller, who's conducting an independent investigation into Russian meddling in the 2016 presidential election.

Some have alleged that Mueller cannot be a fair special counsel because of his relationship with former FBI Director James Comey, who was fired by President Donald Trump last month.

Sen. Jeanne Shaheen (D-NH) asked Rosenstein if he has seen evidence for “good cause” to remove Mueller, whom he appointed last month after Comey's firing.

“No, I have not,” Rosenstein answered. “I am confident he will have sufficient independence.”

Rosenstein noted that he is the only one who could fire Mueller, as Attorney General Jeff Sessions has recused himself from the Russia investigation.

Sen. Susan Collins (R-ME), asked Rosenstein what he would do if Trump directly asked him to fire Mueller.

"Senator, I'm not going to follow any orders unless I believe those are lawful and appropriate orders," Rosenstein said. "Special counsel Mueller may be fired only for good cause, and I am required to put that cause in writing. So, that's what I would do. If there were good cause, I would consider it. If there were not good cause, it wouldn't matter to me what anybody says."

Watch Catherine Herridge's report above.

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