clinton is honest and trustworthy. reporter: top clinton advisers told fox they re tofocus focused on winning the democratic nomination even as they shielded the candidate from questions about her e-mail and other issues. hillary will be doing a lot of interviews. but at the beginning of the campaign she didn t want the focus of a national stage. reporter: at the end of the event she did walk up to the media and was peppered with several questions. she only gave one answer that repeated her message here. joe biden says he s still weighing whether or not to get in and challenge clinton. now, to the newest candidate to get into the race. at 43 marco rubio is also the youngest of the confirmed candidates. he s seeking to draw a contrast between himself and his elders in both parties. chief political correspondent carl cameron. reporter: one day after