Though Trump initially got attention by expressing doubts whether Obama was born in the USA, that issue is not driving his support. Among those who say they definitely or might vote for Trump, only about a third question whether the president was born in the USA.
Support from the “birthers” is stronger for Sarah Palin, Mike Huckabee and Mitt Romney. The issue has persisted even though Hawaii has released an official Certificate of Live Birth showing Obama was born there, a fact confirmed in non-partisan investigations by FactCheck.org and others.
Still, in the USA TODAY poll, only 38% of Americans say Obama definitely was born in the USA, and 18% say he probably was. Fifteen percent say he probably was born in another country, and 9% say he definitely was born elsewhere.