we hear from tim bassett of the trading commission. ♪ which of the doubt six cents up. ♪ david: fromrg's world headquarters in midtown, manhattan, you are watching " bloomberg markets." let's check on the headlines this afternoon. mark crumpton has more. senator bernie sanders is promising that the democratic will betial convention - contested. the vermont senator says that by the end of the primary next month the front runner, hillary clinton, won't have enough pledged delegates to win the nomination. he's planning on being able to flip some superdelegates who are supporting this is clinton. most public school students and this monday.ay off teachers staged the out to protest funding issues. union encouraged instructors to call out sick after the district said that it wouldn't have enough money to pay teachers the summer. in march emergency funding was made available to keep the district operating through the end of the school year. -- warns that puerto rico may need the u.s. government bailout if congress doesn't act. he is calling on lawmakers to pass a bill that helps the island