One of President Trump’s best tools to “drain the swamp” is under threat from his own side.... Republican Congress members began attacking a key piece of anti-corruption legislation. This rule, the Cardin-Lugar provision (also known as Section 1504 of the Dodd-Frank Act), was a bipartisan effort to shield US citizens and shareholders from millions of their dollars vanishing to foreign oligarchs in the oil, gas and mining sector... The “swamp” — a handful of lobbyists, executives and contractors who feed off such business ties — has attacked it for years... United States leadership inspired similar legislation in the EU, oil-rich Norway, Canada and beyond. In total, governments enacted similar provisions in over 30 countries.  Today these measures apply to 80 percent of the world’s largest publicly listed oil, gas and mining companies, including state-owned companies from Russia, China and Brazil. This is a win-win for resource-rich countries too: citizens from Indonesia to Zimbabwe are using these transparency laws to keep track of the funds their governments receive and ensure that oil, gas and mining revenues don’t simply vanish into private accounts held offshore, but rather contribute to shared economic growth... Yet a handful of oil companies seeking to keep their business dealings secret continued to oppose the law. Leading this opposition was one company, Exxon Mobil, hiding behind an oil lobbying group called the American Petroleum Institute (API).