President Donald Trump suggested that the U.S. Supreme Court ruling against his immigration policies could destroy the U.S. Trump attacked the court on Truth Social after asking it for permission to deport Venezuelan men whom his administration accused of being linked to gangs.

When the Supreme Court hears arguments Thursday over President Trump’s challenge to automatic birthright citizenship, the immigration spat could take a backseat to a more contested legal question about the power of lower-court judges to rein in the executive branch.