Former Department of Homeland Security (DHS) Secretary Michael Chertoff on Sunday called potential Republican efforts to impeach the agency’s current leader, Alejandro Mayorkas, a “political stunt.” In an interview with CBS’s “Face the Nation” moderator Margaret Brennan, Chertoff, who served under former President George W. Bush, said House Republicans threatening to impeach Mayorkas would be engaging in performative politics, calling any effort to do so a “very sad day.”