The House on Thursday voted to move forward with a vote on a nominee to head the Environmental Protection Agency.
The White House and the Environmental Protect Agency declined to comment.
House Speaker Paul Ryan said the vote was necessary to “move quickly” to pass the Trump administration’s climate and environmental agenda.
Republicans had been poised to pass their own plan to repeal the Affordable Care Act on Thursday.
The legislation was expected to be approved in the House but is unlikely to get enough support to pass in the Senate.
Republicans have struggled to advance their plan after President Donald Trump fired the director of the EPA.
Democrats and the Sierra Club, which supported the move, argued the Trump EPA was in the way of protecting public health and the environment.