WASHINGTON - President Obama is on a two-week vacation in Martha's Vineyard, as wars rage across the Middle East and Ukraine, terrorists threaten to topple Iraq, and Republicans are on the brink of capturing the Senate. Around the country, a deepening mood of anger and anxiety permeates America's electorate, with the midterm elections a mere three months away. And in a brewing political civil war among Democrats, Hillary Clinton has unleashed a sharp attack on Obama's timid foreign policy, calling for a more muscular response to the spread of global terrorism. The president's job approval scores remain in the...