Presidential candidates cite intent to improve US stature, but retooling policies is complicated.
Readers write about the extent of Barack Obama's appeal and the specifics of his campaign.
The two candidates are running neck and neck before the Republican primary Tuesday.
On the eve of Tuesday's primary in Florida, the one-time national GOP front-runner is still running strong among Cuban-Americans, who represent 10 to 12 percent of the state's GOP electorate.
Clean energy work is a rapidly growing industry, but critics say it's no panacea for unemployment.
Rising entitlement costs and Iraq war expenses take a back seat to shorter-term stimulus plans.
Florida's Jan. 29 race is the first with all GOP hopefuls contending in full.
Loss is major setback for Huckabee. Romney remains contender with win in Nevada.
He builds his campaign in the state on lessons from his run in 2000.