USA correspondent Danielle Kurtzleben

Tomorrow is Super Tuesday in the United States and Donald Trump's chances at a victory as the Republican candidate are looking firmer than ever. The US Supreme Court has ruled in Trump's favour, agreeing that he can stay on the ballot in Colorado, overruling the top court in the state. Meanwhile Presdient Joe Biden is running relatively unopposed for the Democrats. Both Biden and Trump made visits to the southern border last week to take starkly different stances on immigration policy. Danielle Kurtzleben is a political correspondent assigned to NPR's Washington Desk.