Jon Lieber, head of Eurasia Group's coverage of political and policy developments in Washington, DC shares his perspective on US politics.

Who were the big winners and the big losers from this week's Republican debate?

Three clear winners were probably Vivek Ramaswamy, who's done pretty well in making a name for himself as a first time politician, and came across as likable and energetic, full of some fresh ideas that are probably going to appeal to a lot of Republican voters who were otherwise thinking about supporting President Trump. Two is Nikki Haley, the former UN ambassador and governor of South Carolina, who had herself a pretty good night scoring some points against Ramaswamy on foreign policy, and coming across as competent and credible. And of course, the third winner is Donald Trump, who didn't show up but kind of dominated the proceedings anyway and continues to be the front-runner even after the debate.