The committee was tasked with finding at least $880 billion in spending cuts to help pay for the $4.5 trillion in tax cut extensions that Republicans hope to approve before the end of the year.

After a marathon markup stretching over 17 hours, the House Ways and Means Committee advanced sweeping cuts to Democratic renewable energy and climate tax credits as part of the tax portion of the massive fiscal overhaul Republicans are aiming to pass to enact much of President Donald Trump‘s domestic agenda.

Key Senate Republicans are resisting the House’s plan to gut clean energy tax credits, vowing to soften the blow for emerging technologies and nuclear power.