President Trump wrapped up his trip to the World Economic Forum in Davos, Switzerland, on Thursday. Before leaving, he met with Ukrainian President Volodymyr Zelenskyy to discuss efforts to end his country's war with Russia. Meanwhile, Steve Witkoff, Mr. Trump's senior envoy for Ukraine and Russia, said that the negotiations were "down to one issue," though he didn't say what the issue was. CBS News' Aaron Navarro reports.
