eugene nicks offer one solution for the threat from without and one for the danger from within. the answer to foreign threat was new immigration laws to limit nonnorthern europeans in the country. the eugenics claim they'd had high number of defects degrading america's gene pool. other things they claimed that between 40% and 50% of jewish immigrants were memory defective. congress held hearings in which various nationalities were explained. act only the arguments congress documented the immigration act of 1924 which invited in more immigrants from northern europe and closed the door to southern and eastern europeans. the harm that disimmigration law did was immense. most of all to the jews of eastern europe who would soon be trying to flee nazi germis ideas ideal regime and would find the door shut in the 1940s at to frank wrote for visas for his wife and daughter, margo and ann, but was turned down because of the 1924 act. so when we think about ann frank it's true she died because of the nazis thought jews were racially inferior and she also died there because the u.s. come be

nick. >> good piece on hillary clinton and bernie sanders and the whole how to get those people -- >> former democratic congressman, harold ford jr. in washington. we have "the washington post's" eugenesaacson. political reporter for "the washington post" and msnbc political analyst, robert costa. good to have you all on board. >> let's ask some big questions of these big guests that we have. important gues who breathe life into our show. our tired, tattered show. >> yes? >> walter isaacson, let's begin with you. >> we're all in washington, where are you? >> should be there. >> the first hour, a lot of talk about bernie sanders, is he staying in the race too long? should he be able to be allowed to stay in the race, to change the democratic party to make it more in his imagine, or is he arrogant and should he drop out now? you've heard the debate, certainly over the last week or so, what do you think? >> and i've read nicholas's piece. look, this is what primaries are for. i remember my first primary i covered with barnacle, with ted kennedy and jimmy carter. ted kennedy went all the way to the convention even though he didn't have the delegates and helped change the platform if if h