Heading into their first debate Thursday evening, what Republican candidates for the presidency need most is to gain visibility. The latest News Interest Index survey finds that two Democratic candidates - Hillary Clinton and Barack Obama - continue to be far and away the most visible, even to Republicans.

Even among Republicans, Clinton and Obama overshadowed the other candidates. A majority of Republicans say they have heard the most about Clinton (38%) or Obama (22%) in the news recently. Just 8% of Republicans say Giuliani has been the most visible candidate recently, 5% cite McCain, and 2% Romney. Little has changed from a month ago, when 8% of Republicans were hearing most about Giuliani, 6% McCain, and less than 1% Romney. Overall, just 16% of Republicans say they have heard the most about a GOP candidate, while 64% name a Democratic candidate.




