The next president will inherit the most ambitious climate policies in American history. Under Joe Biden a trio of laws—the CHIPS and Science Act, the Bipartisan Infrastructure Law and especially the Inflation Reduction Act (IRA)—have put in place a sweeping industrial policy that seeks to subsidise an ambitious decarbonisation of the economy. Left-wingers, who think the investments are not ambitious enough, hope that a President Kamala Harris will go further. Conservatives are confident a re-elected President Donald Trump will tear it all down.