New details from Kurt Volker's closed-door interview indicate Bill Taylor, the acting ambassador to Ukraine, was deeply conflicted about whether to take the job because of concerns about Rudy Giuliani's shadow involvement.

Why it matters: The testimony by Volker, the former special envoy to Ukraine, earlier this month may help the president in the sense that it paints Giuliani, not President Trump, as the mastermind behind a campaign to get foreign leaders to investigate the Biden family and Burisma, according to sources with direct knowledge of his testimony.