A White House official said Wednesday that major climate measures sought by the administration but left on the cutting room floor during infrastructure negotiations with Republicans will be non-negotiable items as the administration looks to the next legislative vehicle.

In a package being put together by the White House, a mandate that may require utilities across the country to create clean electricity and a tax-credit extension worth hundreds of billions of dollars for the wind, solar, and other renewable energy companies are must-haves. The White House's domestic climate adviser, Gina McCarthy, stated.

“We do have some bottom lines in this,” McCarthy said during a forum held by Punchbowl News. “We need to make sure we are sending a signal we want renewable energy and it will win in the marketplace.”

McCarthy also stated that the White House intends to seek tax credits and consumer rebates for electric vehicles as part of the proposal, which Democrats intend to pursue through the so-called budget reconciliation mechanism, which avoids a Republican filibuster in the Senate. The endeavor, though, is far from inevitable, given the party's razor-thin Senate majority.

McCarthy's comments came amid criticism from progressives that a bipartisan infrastructure agreement reached by Congress and President Joe Biden last week failed to include significant investments in renewable energy, the power system, and electric vehicles that the White House had requested.