There have been rash of 50-state polls coming out recently: Survey Monkey (with the Washington Post), Ipsos (with Reuters), and Morning Consult all released polls within the week. For the sake of this article think of polling as a two-step process, researchers: collect responses from a sample of the population and analyze that data. There are trade-offs and benefits to collecting samples across the country at one time, but the key reason to do a single 50-state polls is that data analysis has evolved to make it very accurate and cost-effective to analyze all 50-states at the same time. CONT.
David Rothschild (Microsoft Research), PredictWise