Donald Trump intends to select Oklahoma Attorney General Scott Pruitt to lead the Environmental Protection Agency, a senior transition official confirmed to NBC News Wednesday, the clearest sign yet the president-elect will pursue an agenda that could undue President Obama’s climate change legacy. An ally to the fossil fuel industry, Pruitt has aggressively fought against environmental regulations, becoming one of a number of attorneys general to craft a 28-state lawsuit against the Obama administration’s rules to curb carbon emissions. Pruitt, who questions the impact of climate change, along with Alabama Attorney General Luther Strange, penned an op-ed in the Tulsa World earlier this year that called criticism they’ve received ‘un-American.’