President Donald Trump said Friday he would seek sweeping changes to U.S. immigration policy through an executive order, suggesting he might create a "road to citizenship” for certain migrants brought to the country illegally as children and shift the criteria for new arrivals to a "merit-based” system.

The new effort will be unveiled "over the next four weeks,” Trump said in an interview with Telemundo.

Critics — including high-profile members of the president’s own party — immediately questioned whether he has the legal authority to overhaul immigration laws without passing legislation through Congress.