(WASHINGTON) -- Deputy Attorney General Rod Rosenstein offered a strong defense of Robert Mueller's appointment and actions as special counsel on Wednesday and further praised the FBI, even as the bureau has been criticized by President Donald Trump in recent weeks.

Appearing before the House Judiciary Committee, Rosenstein, who serves as acting attorney general in matters related to last year's presidential election given Attorney General Jeff Sessions' recusal in such cases, said Mueller was an "ideal choice" for the position and pushed back on the suggestion that investigators on the Russia probe have acted with bias.

Rosenstein said it would be "very difficult" for "anybody to find somebody better qualified for this job.

"Director Mueller has, throughout his lifetime, been a dedicated and respected and heroic public servant," he said.

Mueller is a Republican who was appointed as special counsel by a Trump nominee.

In August, FBI investigator Peter Strzok was removed from the Russia inquiry, later revealed to be due to his participation in text message conversations critical of Trump with a colleague. ABC News reported Tuesday evening that the texts included messages that the president -- still a candidate at the time of the exchanges -- was "an idiot."

Rosenstein addressed concerns from congressmen on Wednesday that political affiliation could have an impact on the impartiality of the investigation.

"I think it’s important to recognize that when we talk about political affiliation… Read more at WBAL