Democratic lawmakers are intensifying their efforts to investigate Kristi Noem, the former Secretary of Homeland Security, following allegations of perjury during her congressional testimony. Top Democrats have formally referred Noem to the Justice Department, demanding an inquiry into her statements regarding a controversial advertising campaign worth $220 million and issues surrounding detention policies. The calls for a criminal referral come after claims that Noem misled Congress, prompting multiple requests for a probe into whether she lied under oath. The investigation has gathered significant attention amidst broader discussions about accountability in government and the integrity of official testimonies.