Federal Reserve chair nominee Kevin Warsh will meet this week with the Republican senator who has been blocking his nomination in objection to President Donald Trump’s attacks on the central bank.

Warsh will meet with Sen. Thom Tillis of North Carolina, the senator’s office said Monday. Warsh will also meet with Sen. Kevin Cramer, R.-N.D., the senator told CNBC.

The Senate Banking Committee, where both Cramer and Tillis are members, oversees nominees to the Fed. Other meetings with members of the committee are expected this week.

Tillis has praised Warsh’s acumen as a potential Fed chair but has said he won’t vote to confirm any Fed nominees until the Department of Justice drops a criminal investigation into Chair Jerome Powell. Powell has called the probe a pretext to punish him for declining to cut rates on Trump’s insistence.

Tillis is set to retire next year when his term expires.