 The president, the White House, his campaign have all been adamant that he has made up his mind and that he isn't going anywhere. The president sent that letter to Democrats stating bluntly, quote, I am firmly committed to staying in this race. And he hasn't been budging. His campaign is clear-eyed that it is going to take a lot of work here to get everyone on the same page. ABC's Mary Bruce, Vermont's Peter Welch became the first Democratic senator to call on the president to withdraw. His supporters, the presidents and Democrats who want him out, will exchange messages on Thursday.