 That is going to be the biggest test. In fact, Biden's success may not be within his control. It may be whether he can egg on Donald Trump to talk about the 2020 election, to talk about some of the conspiracy theories that he occasionally gets into on the campaign trail. Trump has a lot to work with at tonight's debate. He's speaking to a public that is dissatisfied with the direction of the country, dissatisfied with President Joe Biden's leadership, the job approval rating for the president as low as it gets.