UTICA, NY - Sixteen percent of all voters and 30% of Republicans do not believe President Barack Obama has proven he was born in the U.S., even after release of his long-form birth certificate, a new IBOPE Inteligência interactive survey finds.

These results are from an IBOPE Inteligência interactive poll conducted April 29-May 2, which was after Obama released the birth certificate and addressed the news media on the topic.

Demographic groups besides Republicans expressing the highest levels of doubt about Obama's birth in the U.S. are conservatives (34%), and those without a college degree (21%) vs. those with a degree (11%).

The IBOPE Zogby interactive poll of 2,020 likely voters has a margin of error of +/-2.2%.  A sampling of IBOPE Inteligência's online panel, which is representative of the adult population of the U.S., was invited to participate.  Slight weights were added to region, party, age, race, religion, gender and education to more accurately reflect the population.

ABOUT IBOPE Inteligência

IBOPE Inteligência is a non-partisan, premier global public opinion polling and market research firm that offers timely, accurate results and in-depth analysis and insights. IBOPE Inteligência works with issue experts in a vast array of fields including healthcare, technology, finance, insurance, energy, agriculture, public affairs, and media who offer insightful data analysis and exceptional service to clients in countries throughout the world. IBOPE Inteligência experts analyze data and work with clients to develop and implement new strategies, and offer customized and attractive solutions to challenges our clients face. IBOPE Inteligência was formed in January 2010 following the acquisition of Zogby International by IBOPE Inteligencia of Brazil, a subsidiary of IBOPE Group.

Please visit www.ibopezogby.com for more information on IBOPE Inteligência International. 

About IBOPE Group

IBOPE Group is a Brazilian multinational company specializing in media, market and opinion research with offices in the United States and 14 Latin American countries. Since its founding 68 years ago, it has been providing a wide range of information and studies on media, public opinion, voting patterns, consumption habits, branding and market behavior.

For more information on IBOPE Group, please visit www.IBOPE.com.