With reports circulating that it’s a matter of when, not if, President Joe Biden declares a climate emergency to circumvent Congress in reaching his environmental goals, conservatives are gearing up to fight back against what they see as executive overreach.

Biden has been teasing executive action ever since Sen. Joe Manchin (D-WV) torpedoed new spending for climate change in the Senate, single-handedly scuttling the deal in the 50-50 chamber. But if the president decides to go it alone, he’ll face plenty of pushback.