Minnesota Rep. Michele Bachmann says House conservatives are preparing to sue President Barack Obama for executive overreach in response to his threats of unilateral action on a host of issues.

“He’s the president of the United States — he’s not a king,” the Republican lawmaker told reporters after Obama’s State of the Union address. “He may think he’s a king, he may declare himself king, but that’s not what he is under our Constitution.”

Bachmann said an effort is underway in Congress to take back their “authority under the Constitution as the House of Representatives.” She said the plan is to introduce legislation allowing lawmakers to hire an attorney, so “we can force the president to act under the Constitution.”

“We’ll sue the president of the United States and force him to no longer act unilaterally,” she said.