Successful microtargeting, in part, explains why in 2015 more than 43 percent of Republicans, according to a survey, still believed the lie that President Obama is a Muslim. And 20 percent of Americans believed he was born outside the United States and, consequently, an illegitimate president. (Democrats may well spread their own disinformation in microtargeting, but nothing that has surfaced matches the scale of the anti-Obama campaigns.)
