As Donald Trump tried to disavow the politically toxic project, its director, Paul Dans, stepped down. But the plans and massive staffing database that he prepared — to replace thousands of members of the “deep state” with MAGA loyalists — remain. In January 2023, a group of about 15 people gathered for three days at the Heritage Foundation, the conservative Washington think tank a few blocks from the Capitol. Their aim was ambitious and farsighted: to start building the next Republican administration, two years before a Republican president might again take office. The group’s leaders originally cast the initiative as…