President Trump on Wednesday endorsed a new bill in the Senate aimed at slashing legal immigration levels over a decade, a goal Trump endorsed on the campaign trail that would represent a profound change to U.S. immigration policies that have been in place for half a century.

Trump appeared with Sens. Tom Cotton (Ark.) and David Perdue (Ga.) at the White House to unveil a modified version of a bill the senators first introduced in April to cut immigration by half from the current level of more than 1 million green cards per year granting foreigners permanent legal residence in the United States.