Fact-checking the Democratic debate in Las Vegas By Linda Qiu on Wednesday, October 14th, 2015 at 9:46 a.m. The Democratic presidential candidates prepare to answer questions at the first Democratic debate hosted by CNN in Las Vegas on Oct. 13, 2015. (AP) The Democrats seeking to succeed Barack Obama went at it Tuesday in Las Vegas. PolitiFact reviews their factual claims. PolitiFact digs into how Hillary Clinton, Bernie Sanders and the gang have done so far on the Truth-O-Meter.