The Trump administration is ending sanctions waivers that allow Russian, Chinese and European companies to do work at sensitive Iranian nuclear sites, following an internal battle between Iran hawks and a more aggressive group of hard-liners inside the U.S. government, according to U.S. officials and documents obtained by The Washington Post. Nonproliferation experts say the waivers, issued after President Trump withdrew from the 2015 Iran nuclear deal , reduce Tehran’s incentive to enrich uranium at higher levels and provide a valuable window into the country’s atomic program. But Secretary of State Mike Pompeo and a group of lawmakers led by Republican Sen. Tom Cotton of Arkansas pushed to exert even more pressure on Tehran and eliminate the vestiges of the Obama administration’s signature foreign policy objective. Pompeo will […]