Housing Secretary Ben Carson, who previously criticized President Barack Obama’s fair housing rule as “social engineering,” said the new rule would give people more affordable housing options in communities nationwide.

“Mayors know their communities best, so we are empowering them to make housing decisions that meet their unique needs, not a mandate from the federal government,” Carson said.

The goal is to boost the availability of affordable housing. But some housing advocates say it could put high-cost coastal cities with great housing needs, such as California, at greater risk of losing federal funds than smaller, less-expensive rural areas, which tend to be more supportive of Trump.