As a government shutdown looms, tensions are rising within Republican ranks.

Rep. Devin Nunes (R-Calif.) had choice words for fellow House Republicans who are willing to see the government shut down over their opposition to Obamacare: "Lemmings with suicide vests," he called them.

"They have to be more than just a lemming. Because jumping to your death is not enough," he said.

"You have this group saying somehow if you’re not with them, you’re with Obamcare. If you’re not with their plan -- exactly what they want to do, you’re with Obamcare. It’s getting a little old," he said.