Sen. Ted Cruz (R-Texas) was exclusively on “The Kelly File” tonight, where he slammed President Barack Obama’s planned executive action on immigration.

“We are unfortunately witnessing a constitutional crisis,” he said.

Cruz said that if Obama defies the American people with this action, it’s incumbent on Republicans to use every constitutional tool so that Obama doesn’t become “an unaccountable monarch.”

Cruz called on the new Congress to block executive and judiciary nominees until Obama ends “illegal amnesty.”

“A presidential temper tantrum is not a rational response,” he said.