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.

The moves allow members to vote for the deal without running afoul of the groups, who wield significant influence in today's GOP.

Heritage Action, in a statement, said it wants to shift back to the budget debate so Republican leaders can focus on halting Obamacare.

"We do not support clean debt ceiling increases, but because Heritage Action is committed to giving House Leadership the flexibility they need to refocus the debate on Obamacare we will not key vote against the reported proposal," Heritage Action CEO Michael A. Needham said in a statement.