A US attorney overseeing the so-called “grand conspiracy” investigation into Donald Trump ’s rivals announced on Friday he is leaving the Department of Justice, one of several officials to leave the department in recent days after sweeping Democratic wins in the midterm elections .

Jason Reding Quiñones, the US attorney for the southern district of Florida, and John Eisenberg, who led the justice department’s national security division, are both leaving. Democrats have pledged to use their majorities in the US House and Senate to conduct aggressive oversight of the justice department, among other agencies.

Quiñones had been overseeing an inquiry into whether former top government officials engaged in a “grand conspiracy” to violate Trump’s rights when they investigated him after the 2020 election. Conservative allies had high hopes for the investigation, whose targets included the former CIA director John Brennan, among others.

But there were personnel issues and charges have not yet been filed.…