They're all maintaining decorum (something they would die before dropping) by congratulating him on his win while denouncing his policies and stopping short of endorsing him. Ever since his victory all the "liberal" corporate media has been praising the "energy" of his campaign while criticizing his policies as dangerous and painting his pro-palestinian views as anti-semitic. Don't even try to pretend the way the DNC has been responding to this is normal. In nearly every other democratic primary the DNC have been quick to line up behind the victor.