This is incorrect. Modern polling calls cell phones, and also uses online surveys. However, the fact that people get so many robocalls from unknown numbers is a

This is incorrect. Modern polling calls cell phones, and also uses online surveys. However, the fact that people get so many robocalls from unknown numbers is attributed to the decrease in overall polling response: https://www.politico.com/story/2019/02/27/phone-polling-crisis-1191637 https://www.politico.com/story/2019/02/27/phone-polling-cris...