Democratic US presidential candidate Senator Elizabeth Warren makes a heart gesture as she addresses supporters at her Super Tuesday night rally in Detroit, Michigan, on Mar 3, 2020. REUTERS/Rebecca Cook

WASHINGTON: US Senator Elizabeth Warren, the liberal firebrand who emerged as a top Democratic contender for the White House on the strength of an anti-corruption platform backed by a dizzying array of policy proposals, will tell staff on Thursday (Mar 5) she is ending her campaign, according to a source familiar with the plan.