SELMA, Ala. (AP) — An emboldened Joe Biden is casting himself as the clear moderate alternative to polarizing progressive Bernie Sanders as the Democrats’ shrinking presidential field races toward Super Tuesday. On Sunday, former South Bend, Indiana, Mayor Pete Buttigieg dropped out of the race. Biden pressed his case during a round of national television interviews that reflected a stark reality a day after his resounding primary victory in South Carolina. Biden is being forced to rely upon free media coverage because he is understaffed, underfunded and almost out of time as he fights to transform his sole win into a national movement.