BOSTON - John Edwards (news - web sites) praised John Kerry (news - web sites) Wednesday night as a man tested by war for national command and promised cheering Democratic National Convention delegates that their ticket will "build one America" no longer divided by income or race. Republicans are "doing all they can to take this campaign for the highest office in the land down the lowest possible road," Kerry's running mate told a nationwide prime-time television audience. The vice presidential candidate urged the country to reject that approach and "embrace the politics of hope, the politics of what's possible...