BROWNSVILLE, Texas (AP) — Attorneys for 25 states are going before a federal judge in Texas to argue for a rollback of President Barack Obama's expansive executive actions to spare nearly 5 million people living in the U.S. illegally from deportation.

Texas leads the coalition of states suing the government. It argues in its lawsuit that Obama's decision "tramples" key portions of the Constitution. At a Thursday hearing in Brownsville, the states will ask U.S. District Judge Andrew Hanen to block the president's actions.

Hanen previously accused the Obama administration of participating in criminal conspiracies to smuggle children into the country by reuniting them with parents living here illegally.

Obama announced the executive actions in November, saying lack of action by Congress forced him to make sweeping changes to immigration rules on his own.

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