I am very proud of being Jewish and that is an essential part of who I am as a human being,” Vermont Senator and presidential hopeful Bernie Sanders says in a new campaign ad he tweeted this weekend on the subject of his Jewishness. It signaled the latest evidence of a marked change from 2016, when Sanders was reticent to discuss his Jewish identity. But while Sanders is enjoying growth with many ethnic and racial groups, his message has not yet won him many Jewish supporters.