House Oversight Committee Chair James Comer (R-KY) revealed Monday that he issued a subpoena as a part of his investigation into Democratic vice presidential nominee Tim Walz’s “ties” to the Chinese Communist Party. In a post to X (formerly Twitter), Comer said he subpoenaed Department of Homeland Security Secretary Alejandro Mayorkas after a “whistleblower” came forward with information about Walz. “According to recently received whistleblower disclosures, we’ve learned of a non-classified, Microsoft Teams group chat among DHS employees and additional intelligence reports that contain informa…