While Barack Obama and John McCain still have two debates ahead of them, tonight is the one and only face-to-face encounter between vice presidential nominees Sarah Palin and Joe Biden. So who faces more pressure? How will they address the ongoing financial crisis? Will the candidates go after each other or the presidential nominees? And what is the impact of Gwen Ifill staying on as the moderator? We ask David Lightman, White House Correspondent for the Washington Bureau of McClatchy News.