The world of US politics has evolved dramatically over the past few weeks, with the latest curveball being the decision by Joe Biden to step down as Democratic candidate in the November's election and endorse his vice president, Kamala Harris. How will Trump and the Republican party respond? Larry Donnelly, a law lecturer at the University of Galway and columnist with The Journal, joins us on this week's episode to examine what the next steps could be.The Explainer is brought to you by The Journal. Providing open access to valuable journalism in Ireland has been the aim of The Journal for a decade. You can contribute to ensure we can keep questioning, investigating, debunking, explaining and informing at www.thejournal.ie/contribute/