Secretary of Labor Marty Walsh, right, visits the Frederick Douglass Memorial Bridge construction site together with District of Columbia Mayor Muriel Bowser and Secretary of Transportation Pete Buttigieg, in southeast Washington, Wednesday, May 19, 2021.

WASHINGTON — Senate Republicans have not substantially budged off their initial $568 billion infrastructure proposal despite overtures from the White House to work toward a compromise as President Joe Biden tries to strike a bipartisan agreement on his sweeping $2.3 trillion infrastructure plan.

The lack of any sizable movement beyond the Republicans’ initial proposal or any other notable changes to narrow the gap with Biden is certain to spark fresh worries from Democrats that time is slipping for a deal. There was “not a significantly changed offer” from the Republicans during their meeting with the administration this week, according to a person granted anonymity to discuss the private negotiations.

At the White House, Press Secretary Jen Psaki said “productive conversations” are underway on Capitol Hill.

The White House team is expected to resume talks with the senators on Friday. “We’re looking forward to constructive conversations,” Psaki said.

District of Columbia Mayor Muriel Bowser, left, and Secretary of Transportation Pete Buttigieg, right, visit the Frederick Douglass Memorial Bridge construction site in together with Secretary of Labor Marty Walsh, in southeast Washington, Wednesday, May 19, 2021. (AP Photo/Manuel Balce Ceneta)