The Trump administration’s proposed model auditions for potential candidates for the 2020 U.S. Senate seat will likely be a failure, a top Democratic senator said on Thursday.

“We need to be able to have people who are qualified and not just the worst models that are out there,” Sen. Elizabeth Warren (D-Mass.) said in an interview with Politico.

“It’s not going to be good.”

Warren, who sits on the Senate Budget Committee, said she is skeptical about the model that the White House is planning to use.

“The model I think is not very effective at all,” Warren said, noting that the administration’s “model” for auditing the Senate selection process has so far been “totally ineffective.”

Warren said that “in the real world, when you look at the model, you find that there’s nothing in the model.”

“They have been told that this is going to work, and that this will be the way it’s going to get done,” she said.

Warren has been a vocal critic of Trump’s nominee for the seat, U.N. Ambassador Nikki Haley, who was confirmed by the Senate on Tuesday.

The White House initially planned to use a modeling process developed by the consulting firm McKinsey & Packard to vet candidates for a spot on the shortlist.

But Warren said she believes the model the administration is using will be “not very good.”

The plan, Warren said Thursday, is “a really bad model” for how the Senate is selected for the U.K. and other key European nations, which also have large numbers of immigrants from Middle Eastern and South Asian backgrounds.

“They should not be in there,” Warren told Politico.

The Senate Foreign Relations Committee has until December to approve the plan.

Trump has said that his plan is “truly the model,” but the president did not respond to a request for comment.

“I am going to keep doing the model audit,” Trump told The New York Times in March.

“That model is not going very well.”

On Tuesday, Haley met with members of the National Academy of Sciences.

She told them that the current model “does not provide the level of detail that we need in a very comprehensive way.”