Cheriss May/Getty Images Democrats are eyeing an obscure law to erase some of Trump's most contentious regulations. The Congressional Review Act gives Congress the power to repeal rules using a simple majority vote. Democrats could scrap Trump rules on everything from air pollution to guidance for investors, just as Republicans did after Barack Obama's exit. Democrats are considering using an obscure but powerful law to obliterate federal regulations the Trump administration hustled to get on the books before leaving office. It's the same law President Donald Trump and congressional Republicans used to wipe away rules put in place by the Obama administration.