>> this is aljazeera america, live from new york, i'm erica pitzi. tony harris has the night off. convention, ted cruz's victory in wisconsin, and the possibility more likely. >>> and amulet'sy million dollars merger terminated. >>> helping people with heroin addictions, there could being be a new treatment option. and the rebirth of vinyl. >> we begin with the state of the presidential campaign in the wake of the wisconsin primary. democrat, bernie sanders and democrat, ted cruz, both scored huge victories last night. and this means that frontrunners, hillary clinton and donald trump face a supply less sure path to their nomination. >> reporter: it is my great pleasure to introduce hillary clinton. [ cheers ] >> in pennsylvania wednesday, the democratic frontrunner embraced organized labor, and tried if her speech to reset her campaign. >> when unions are strong, families are strong and americans are strong. >> but after losing seaso sevenf the eight contests, her frustration with bernie sanders is boiling over. in an interview, she attacked him over climate change. >> i couldn't