Sen. John McCain's presidential campaign has announced that Martin Feldstein, former chief economic adviser to President Ronald Reagan, has endorsed John McCain for president. "I am proud to lend my support to John McCain for president," said Martin Feldstein. "John McCain is the candidate with the experience and leadership to keep America secure, with a proven track record as a fiscal conservative who can bring spending in Washington under control, and who can be trusted to build a stronger economy and brighter future for the next generation." McCain thanked Feldstein for his support, stating, "Martin Feldstein was a trusted advisor...