Sen. Chuck Grassley of Iowa said he would vote for former Vice President Joe Biden, but would not support his nomination to be Ambassador to the United Nations.

“I would be very surprised if he was confirmed.

I’m sure that he would get a lot of votes.

I would be surprised if Biden was confirmed,” Grassley told reporters on Wednesday.

Biden’s Senate campaign did not immediately respond to a request for comment.

Groups supporting Biden’s nomination to the top post in the United States are urging Republicans to reject the nomination.

“The president has made it abundantly clear that he intends to nominate Biden, regardless of whether it is approved by the Senate, and we are committed to making sure the Senate is able to do its job,” said Jennifer Cafarella, vice president for policy at the Council on Foreign Relations, a left-leaning think tank.

“There is no doubt that Joe Biden would be an outstanding ambassador to the U.S.,” Cafarella said.

“But I am concerned that if the Senate continues to move forward with its process, Biden will be denied a vote on the floor.”

Biden has not made an official announcement on whether he would seek re-election to his Senate seat.