Donald Trump's Lead in the Real Clear Politics Average Is 30 Points Better Than the Guy in Second Place

David Gergen: If you're running for president, why not run in Iowa or South Carolina? He says the two states are bellwethers of how a candidate will do. Donald Trump's lead over Ron DeSantis puts him about 30 points better than second-place finisher. Gergen: I don't think we'll know anything until August when the campaign really starts.