The Trump administration has said it plans to overhaul Head Start, tossing out many of the regulations that are the hallmark of the early education program for the nation’s neediest children. Head Start centers serve about 700,000 of the nation’s most vulnerable children, including those who are homeless, in foster care or disabled. “This version of Head Start is a shell of the program,” said Khari Garvin, who oversaw Head Start under Joe Biden, the former Democratic president. He estimated the new rules could generate more than $2bn in savings and potentially allow Head Start to serve more children. He added that he tried to shield Head Start from many of the cuts that hit the rest of his agency.