Say it with me: Twitter is not real life.

The common mistake made by journalists, politicians, aides, think tankers, and other politicos is to confuse their online Twitter bubble with real life. Too many mistakenly think the echo chamber that is their news feed is actually representative of the electorate or the public at large. But the entry polls surveying voters as they showed up for Monday night’s Iowa caucuses indicate that many Democratic primary voters, a politically engaged subset of society, do not use Twitter for political news.