At the San Francisco Chronicle, Stanford Professor Joel Brinkley argues the President Obama is “wasting his time” trying to improve relations with North Korea: In the months since Obama took office, North Korea has test fired long-range missiles, threatened and belittled South Korea and conducted a nuclear test – even as Washington let Pyongyang know that it wanted to improve relations. Finally, it appears, the administration has had enough. Secretary of State Hillary Rodham Clinton, attending the July 23 meeting...