1 Introduction

2 Background and Setup

3 Multilevel Calibration: Approximate Post-Stratification

4 Double Regression with Post-Stratification (DRP)

5 Comparison to Inverse Propensity Score Weighting via Multilevel Modelling

6 Simulation Study Calibrated to the 2016 U.S. Presidential Election

7 2016 U.S. Presidential Election Polls

8 Discussion