President Trump hasn't discussed firing special counsel Robert Mueller, who is investigating possible ties to Russia, said White House adviser Kellyanne Conway on Sunday.

"The president hasn't even discussed that," she said on ABC's "This Week" with George Stephanopoulos, who asked, "Does the president commit to firing Robert Mueller?"

"We are complying and cooperating," she said. "Well, hold on, I am not the president's lawyer here, but I will tell you as his counselor, he is not discussing that."

She pointed out that Mueller just hired the 16th new person for his team and that "many of them are Democratic donors," which has been a concern for some of Trump's staunchest supporters. Despite this, Conway pledged, "we'll continue to cooperate and comply."

Still, some in Congress are concerned Trump may still try to get Mueller fired. Deputy Attorney General Rod Rosenstein, who took command of oversight of the federal probe after Attorney General Jeff Sessions recused himself, ultimately has the final say on whether Mueller goes. Rosenstein has said he wouldn't do so without just cause, but Trump could theoretically reshuffle the DOJ chain of command to see Mueller removed. Members on both sides of the aisle have warned Trump against trying to oust Mueller, and legislation has been introduced to prevent Trump from doing it.

Conway said that so far in his investigation of Russian interference in the 2016 election and possible ties to the president, "you've got conclusion and no collusion. And anyone who denies that is lying."