Like Donald Trump, Joe Biden has made a border wall promise he might not have the legal authority to keep. On his first day in office, Biden hit pause on billions of dollars set to be spent on his predecessor’s long-touted barrier between the U.S. and Mexico while his administration figured out next steps for the money. Now the Government Accountability Office is launching a review to determine whether the new president broke the law by freezing the money in violation of budget rules designed to keep Congress in control of the cash flow, the federal watchdog confirmed this week.

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