A Republican senator put a hold on all of President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE's trade nominees until U.S. Trade Representative Robert Lighthizer Robert (Bob) Emmet LighthizerWhiskey, workers and friends caught in the trade dispute crossfire GOP senator warns quick vote on new NAFTA would be 'huge mistake' Pelosi casts doubt on USMCA deal in 2019 MORE is more responsive to his concerns.

Sen. Tim Scott Timothy (Tim) Eugene ScottAuthor Ryan Girdusky: RNC worked best when highlighting 'regular people' as opposed to 'standard Republicans' Now is the time to renew our focus on students and their futures GOP lobbyists pleasantly surprised by Republican convention MORE of South Carolina said Wednesday during a nomination hearing for two of Trump’s trade nominees that he won’t vote on anyone in the "trade space" until Lighthizer responds to his call about a trade-related issue in his state.

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“The reality of it is, I don’t ask for much," Scott said during the Senate Finance Committee confirmation hearing.

"You can not call me back but you cannot disrespect the companies and the trading partner that is South Carolina," he said.

"And without more responsiveness and without a commitment for more responsiveness I will not be voting for any nominees in the trade space."

USTR conceded there was some miscommunication and moved to resolve the issue with Scott after the hearing.

"Apparently there was a communications breakdown in our office and Amb. Lighthizer did not know Sen. Scott had requested a call," a USTR spokesperson told The Hill.

Lighthizer, who was on Capitol Hill before the Finance panel's hearing, met with Scott after the hearing, according to USTR.

Senate Finance was toward the end of the long-awaited nomination hearing for two deputy U.S. trade representatives — C.J. Mahoney, who is slated to handle U.S. trade policy in China and Africa, and Dennis Shea, who is nominated to represent the United States at the World Trade Organization in Geneva — when Scott announced his plan.

“So while you both, I think, are very qualified, I will be putting a hold on your nominations until I find more responsiveness from Mr. Lighthizer,” Scott said.

Scott, who was the last person to speak at the nearly two-hour nomination hearing, made his announcement to a nearly empty dais, with only top Democrat Sen. Ron Wyden Ronald (Ron) Lee WydenGOP senator blocks Schumer resolution aimed at Biden probe as tensions run high Republican Senators raise concerns over Oracle-TikTok deal Hillicon Valley: TikTok, Oracle seek Trump's approval as clock winds down | Hackers arrested for allegedly defacing U.S. websites after death of Iranian general | 400K people register to vote on Snapchat MORE (Ore.) and new panel member Sen. Sheldon Whitehouse Sheldon WhitehouseLWCF modernization: Restoring the promise Restaurant owner defends calamari as 'bipartisan' after Democratic convention appearance Warren calls on McConnell to bring Senate back to address Postal Service MORE (D-R.I.) left in the room.

Scott said he had agreed to support Lighthizer for the job to head the nation's trade office because the former Washington trade lawyer had promised to be “open, transparent and available.”

But Scott said a phone call to Lighthizer to discuss a trade-related issue in South Carolina Scott was “met with crickets."

The two nominees seemed on a glide path to confirmation after six months of waiting by garnering the support of Wyden, until Scott made his remarks.

The Trump administration has struggled to move nominees through the Senate. The nominations of Mahoney and Shea were both sent to the Senate by the White House last July.

This story was updated at 2:30 p.m.