Iowa Republican Congressman Steve King says President Obama will provoke a “constitutional crisis” if he follows through with an executive order that would shield millions of illegal immigrants from deportation.

Congress was in session last week and King talked with his colleagues about what action can be taken if the President issues that executive order.

The “preferred” option, according to King, would be for the president to back off his threat to take executive action but, if the President does, King says congress can act quickly in December to shut off funding for the agencies that would carry out the new immigration policy. As for filing articles of impeachment against the President if he does issue an executive order on immigration, King says that’s a political decision.

Some Democrats have said executive action from President Obama on immigration would only be temporary, as it would put pressure on congress to act.