Newly minted Agriculture Secretary Sonny Perdue is expected to unveil a new rule Monday aimed at giving schools more flexibility in meeting federal nutrition standards for school lunches.

The U.S. Department of Agriculture (USDA) announced Friday that Perdue and Sen. Pat Roberts Charles (Pat) Patrick RobertsThe Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill GOP senators say coronavirus deal dead until after election Trump says he'll sign USPS funding if Democrats make concessions MORE (R-Kan.) will make the announcement at the Catoctin Elementary School in Leesburg, Va., where they are expected to eat lunch with the students.

Republicans have long been trying to dial back the standards that became a pillar of former first lady Michelle Obama Michelle LeVaughn Robinson ObamaNational Urban League, BET launch National Black Voter Day The Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE’s initiative to curb childhood obesity in the U.S.

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Roberts introduced legislation with Sen. Debbie Stabenow Deborah (Debbie) Ann StabenowOVERNIGHT ENERGY: Trump rollbacks could add 1.8 billion tons of greenhouse gas emissions over 15 years: analysis | Intensifying natural disasters do little to move needle on climate efforts | Experts warn wildfire smoke could worsen COVID-19 GAO report finds brokers offered false info on coverage for pre-existing conditions Democrats back away from quick reversal of Trump tax cuts MORE (D-Mich.) last year to give schools two more years to meet new reductions on sodium, but the bill never passed.

Renewed efforts to ease the federal standards came as disappointing news to some advocates.

The American Heart Association was quick to push back. In a statement, the group’s CEO, Nancy Brown, said the current standards are already working and that 99 percent of schools are in compliance.

“Improving children’s health should be a top priority for the USDA, and serving more nutritious foods in schools is a clear-cut way to accomplish this goal,” she said.

“Rather than altering the current path forward, we hope the agency focuses more on providing technical assistance that can help schools get across the finish line, if they haven’t done so already.”