Democrats’ 2020 front-runner ended the primary debate season much the way he began it: Stumbling and mumbling. In his final performance before the Iowa caucuses, Biden once again struggled stringing together coherent sentences. During one of his first answers, Biden attempted explaining his foreign policy toward the Middle East: "It's a mistake to pull out the straw, small number of troops … It's lie that our embassies were going to be bombed."