Ten Democrats vying to be the next president sparred over issues like immigration and gun control in the policy-heavy first debate of the 2020 primary season, providing a glimpse at the issues that will define the race for the nomination over the months to come. In the briskly paced debate, candidates explained their differences on health care, climate change and LGBTQ issues. The debate revealed some of the key differences between the candidates – Cory Booker, Bill de Blasio, Julián Castro, John Delaney, Tulsi Gabbard, Jay Inslee, Amy Klobuchar, Beto O’Rourke, Tim Ryan and Elizabeth Warren. (NBC News)