A House Republican on Sunday said the lower chamber would have to consider impeaching President Obama if he proceeds with plans to expand the deferral of deportations for millions of illegal immigrants.

“If the president has decided that he’s not going to enforce any immigration law ... I think 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 say,” Rep. Steve King, R-Iowa, said on “Fox News Sunday.”

“Where would we draw the line otherwise?” he added. “If that’s not enough to bring [impeachment] then I don’t know what would be. We've never seen anything in this country like a president that says 'I'm going to make up all immigration law that I choose, and I'm going to drive this thing regardless of the resistance of Congress.'"

House Republican leadership has dismissed the impeachment chatter, however, accusing Democrats of using the speculation as a fundraising ploy. Progressives have focused heavily on the likes of King and former Alaska Gov. Sarah Palin, who have long sounded the drum on impeaching Obama.

And Democrats have seen an uptick in fundraising in recent days, due mostly, they say, to the impeachment talk.

Most Republicans would prefer to stop talking about impeachment, though.

“We have no plans to impeach the president. We have no future plans," Speaker John Boehner, R-Ohio, recently told reporters, calling such suggestions a Democratic “scam.”

But the White House counters that Boehner once dismissed talk of a government shutdown before it happened last fall.