President Obama and Secretary of State John Kerry are being accused of ignoring the plight of a U.S. Marine imprisoned in Mexico on gun charges -- with no indication whether Kerry even brought up the case during high-level meetings this week in Mexico City. "I don't think Kerry gives a damn about this guy," Rep. Duncan Hunter, R-Calif., told FoxNews.com on Thursday. The case of Sgt. Andrew Tahmooressi is notable for the lack of public attention it's gotten from administration officials. Then-Secretary of State Hillary Clinton spoke out in 2011 on American hikers imprisoned in Iran, and her husband even...