U.S. President Donald Trump on Tuesday signed an executive order aimed at preventing large Wall Street investors from competing with individual Americans in the single-family housing market, the White House said.

“To preserve the supply of single-family homes for American families and expand pathways to homeownership, it is the policy of my Administration that large institutional investors should not buy single-family homes that could otherwise be purchased by families,” Trump said in the order.

The move comes as Trump faces mounting pressure to address housing affordability ahead of this year’s congressional elections. In recent weeks, he has advanced a series of policy proposals designed to boost homeownership and curb rising living costs.

Under the order, the administration is instructed to issue guidance within 60 days outlining restrictions on the sale of single-family homes to large institutional investors, according to the text released by the White House.

The directive also calls for further action, including a review by the Treasury secretary of existing rules and guidance governing the acquisition and holding of single-family homes by major institutional investors, with an eye toward possible revisions.