An AP News live-updates page reports that after Democrats won both chambers of Congress in the midterms, they are preparing investigations into the Trump administration, targeting the $495 million Minnesota detention facility purchase and Robert F. Kennedy Jr.'s vaccine overhaul, while the Justice Department says it will cooperate but "will not back down." The page also covers Chris Van Hollen's challenge to Chuck Schumer for Senate Democratic leader, Republicans reelecting John Thune and picking Jim Jordan in the House, and Donald Trump's mixed messages on the Iran war and immigration enforcement.