Biden Begins Drawing Contrasts With His Democratic Rivals

(Bloomberg) -- Joe Biden returned to the campaign trail with a new drive to contrast his views with those of other Democratic presidential hopefuls after a rough debate performance last week highlighted his tenuous grasp on front-runner status.After spending the first two months of his campaign focused on attacking President Donald Trump, the former vice president turned his attention to rivals in his own party. He began a two-day swing across Iowa to make his case for moderation as other leadin