Two leading conservative groups say they won't penalize Republicans in Congress for backing a short-term increase in the debt limit being proposed by House GOP leaders.

Heritage Action, a conservative group that has been leading the Defund Obamacare movement in recent weeks, said it opposes the "clean" short-term debt limit increase but that it won't use the vote as a "key vote" to rate members.

The conservative Club for Growth also says it won't key vote the measure.