The three contenders challenging President Donald Trump for the GOP nomination in 2020 -- former Massachusetts Governor Bill Weld, former South Carolina Governor Mark Sanford, and former Illinois US Rep. Joe Walsh -- shared a stage at the 2019 Politicon in the last weekend of October. There was a lot of talk of Donald Trump. The conversation opened talking about impeachment, the word "traitor" was thrown around, followed by conversations about economic issues and foreign policy.