Despite previous disparaging comments about her 2016 rival, former US secretary of state says her top priority is defeating Trump; Democrats unload on Sanders ahead of key debate

With fear among Democratic establishment that self-described democratic socialist could gain significant lead from S. Carolina, some show their lines of attack in digital, TV ads

Rival candidates in US Democratic primaries try to slow front-runner's momentum ahead of South Carolina vote and Super Tuesday, with nobody prepared to drop out of race yet

An anti-establishment US presidential candidate gains an advantage against multiple moderate contenders, rocking their party. Sound familiar?

At Las Vegas event, five other Democrat presidential candidates take aim at Jewish former New York City mayor’s record on policing, treatment of women and support for workers

Vermont senator also sees an increase in those saying he could beat Trump in November; ABC/Washington Post survey puts Bloomberg in 3rd place

'This type of energy is not going to defeat Trump,' tweets billionaire after coming under attack for 'trying to buy the presidency'

Critics of Vermont senator are further than ever from unifying behind a moderate alternative, and none of race's viable centrists are eager to exit to clear path

Billionaire former mayor of NYC has spent more than $417 million of his own money so far on advertising nationwide; rivals urge him to compete on debate stage

In Las Vegas, former vice president decries Democratic rival's support for exempting gun manufacturers from liability for shootings; Sanders has since changed his position