The architect of the worst immigration crisis ever in America told a friendly Harvard University audience last night that he fought with sanctuary city officials over arresting criminal illegal immigrants, a claim immediately mocked by a top immigration hawk.

Former Homeland Security Secretary Alejandro Mayorkas, impeached for failing to protect the border, told students at a Harvard Institute of Politics conference that it is “irresponsible” for cities to protect criminal illegal immigrants. He said it was a problem he tackled as a deputy homeland official under former President Barack Obama and as former President Joe Biden’s homeland security chief.