Democratic U.S. Sen. Amy Klobuchar says she's running for governor of Minnesota. Klobuchar announced her candidacy in a video Thursday. Klobuchar promises to take on President Donald Trump's administration and unify Minnesota after a series of challenges. Klobuchar's decision gives Democrats a high-profile candidate as they try to keep the office held by Tim Walz, their 2024 vice presidential nominee. Walz recently dropped out amid criticism over mismanagement of taxpayer funding for child care programs. Klobuchar has been a vocal critic of Trump, especially regarding his Republican administration's immigration crackdown in Minnesota. The Minnesota contest is expected to test Trump's law-and-order approach against Democrats’ criticisms of his administration's tactics.