In this two part series, Øptimus co-founder and Data Science Director for Decision Desk HQ Scott Tranter joins Ron Steslow to talk about data science, polling, and modeling To unlock more episodes, visit: https://politicology.com/plus (01:00) The role of a data scientist on a campaign  (04:20) What message testing is and how it’s used (11:15) Understanding voters you need to persuade and voters you need to turn out (15:16) Explaining sampling  (34:36) Polling vs modeling (37:15) Why pollsters choose the cohorts they do Follow Scott and Ron on Twitter: https://twitter.com/stranter https://twitter.com/RonSteslow Learn more about your ad choices. Visit megaphone.fm/adchoices