joining me now to discuss is david wasserman, the house editor of the cook political report and republicanategist elizabeth mayer. he wrote this piece for "the new york times," who speaks for the mountain west?" hey, hang, let's look at the data. we'll start with all democrats according to fox, joe biden has a commanding lead, 18 points over his nearest competitor. that would be bernie sanders, elizabeth warren, mayor pete. kamala harris. if you drill down on pennsylvania and look a biden/trump matchup, he's got an eight-point lead over the president. liz, here's the question, historically speaking, is it likely someone can enter the race, being a front-runner in a huge field and maintain that lead and winning the nomination? >> historically, it's not likely. but i think in 2016, we saw historical patterns completely become ruptured. the question is whether what we saw in 2016 has become the new normal. or in this cycle we see candidates crest or fall. and keying to getting your candidate to crest and carry them through. personally, i think we may be in a condition where joe biden would be