 Wearing a Howard University hoodie and sneakers, she gathered with aides at the vice president's residence and worked the phones for 10 hours, calling more than 100 party leaders, union officials, and others. This according to a person familiar with how she spent her day. And it appears to have worked. The endorsements have been rolling in, including from many of the big-name Democrats who had previously been mentioned as possible candidates. Tamara Keith, NPR News.