Iowa Rep. Steve King (R) on Sunday said the House may have no choice but to impeach the president if he takes unilateral action on immigration reform.

Obama plans to announce later this month some form of executive action aimed at filling the void left when Congress shelved immigration reform this year. And should the president do so, King said it would potentially be a constitutional encroachment so severe the House would have no choice but to respond.

"Congress has to sit down and have a serious look at the rest of this Constitution, and that includes that 'I' word that we don't want to have to say," King said on Fox News Sunday.

"I only say that now on this program because I want to encourage the president: Please don't put America into a constitutional crisis," he added.

Speaker of the House John Boehner (R-Ohio) has said that despite the clamoring from some on the right, the House has no plans to impeach the president. --Jon Terbush