Department of Homeland Security (DHS) Secretary Alejandro Mayorkas misled Congress when he testified under oath in May that the Disinformation Governance Board (DGB) “had not yet begun its work,” two Republican senators claim. In fact—according to documents obtained from a DHS whistleblower by Sen. Charles Grassley (R-Iowa) and Sen. Josh Hawley (R-Mo.)—planning, decision-making and concrete work…