The U.S. Department of Justice opened a criminal investigation into Minnesota Governor Tim Walz in January 2026, issuing grand jury subpoenas to his office and other state officials over alleged obstruction of federal immigration enforcement actions. Separate congressional and federal scrutiny has focused on oversight lapses during large-scale Medicaid and housing fraud schemes in the state, with prosecutors estimating up to $9 billion in losses since 2018 and dozens of individuals already charged or convicted. Walz has publicly endorsed the fraud prosecutions and highlighted state anti-fraud measures, while no indictments have been filed against him. Resolution of the obstruction probe and any related legislative hearings remain the primary near-term catalysts for market movement.