U.S. President Joe Biden says he has done a "deep dive” on four potential Supreme Court nominees thus far and intends to choose one who won’t be "ideological” and can win votes from Senate Republicans.

So far, Biden has dug in with "thorough background checks” on four candidates to look for anything that would disqualify them, he said in a Thursday interview with NBC News. He did not say whether the four people he’s studied make up part or all of his short list for the nomination.

The U.S. leader said he’s confident that any pick he makes will be able to win Republican votes because "I’m not looking to make an ideological choice.” He’s looking to replace the retiring Stephen Breyer with someone who has "an open mind who understands the Constitution, interprets it in a way that is consistent with the mainstream interpretation of the Constitution.”