US presidential hopefuls launch campaigns in Iowa

GOP presidential hopefuls spar in second debate

Iowa State Fair: Presidential Hopefuls Vie for Voter Hearts

GOP Presidential Hopefuls Rally in New Hampshire

Presidential hopefuls campaign for party nominations

Presidential hopefuls campaign for party nominations

Taiwan presidential election: ads reflect contrasting campaigns of hopefuls Tsai Ing-wen and Han Kuo

Presidential hopefuls run campaign based on pledges

Presidential hopefuls sweep through nation, entering week-2 of official campaign period

Presidential hopefuls run campaign based on pledges

US presidential hopefuls campaign in New York

Presidential hopefuls campaign for party nominations

Presidential hopefuls sweep through nation, entering week-2 of official campaign period

Presidential hopefuls sweep through nation, entering week-2 of official campaign period

Presidential hopefuls run campaign based on pledges

Madagascar's presidential hopefuls hold final campaigns

Korea's presidential hopefuls' last day of campaign

US: Democrat Presidential Hopefuls in Michigan to Campaign for Votes

Presidential hopefuls campaign for party nominations

Presidential hopefuls run campaign based on pledges