It seemed like a typical day for President Obama. He taped a TV interview on trade, hosted the champion NASCAR team on the South Lawn and met with the defense secretary in the Oval Office. Not so typical was something that didn’t appear that day on the president’s public schedule: notification to Congress that he intends to renew a nuclear cooperation agreement with China . The deal would allow Beijing to buy more U.S.-designed reactors and pursue a facility or the technology to reprocess plutonium from spent fuel. China would also be able to buy reactor coolant technology that experts say could be adapted to make its submarines quieter and harder to detect. The formal notice initially didn’t draw any headlines. Its unheralded release on April 21 reflected the administration’s anxiety that it might alarm members of Congress and nonproliferation experts who fear China’s growing naval power — and […]