But in a race where an African-American male and a female have a viable shot at their party's nomination -- and the White House -- some question, even with the conservative vote, if the Republicans are diverse enough to clinch a win.
Critics have charged that the party has evolved into a party just for Caucasian Americans, but McCain said he has had plenty of support from Hispanics.
"I think with the Hispanic voter, we were doing very well and now, unfortunately, we're seeing a drop in that support. I got 70 percent of the Hispanic vote in my last re-election and I'm proud of that," McCain said.
"I think that, we, it's a challenge but perhaps maybe not as big a challenge as the African-American vote. I'm not talking about anything except demographics [which] dictate that the Republican party has to be a 'big tent' party. And we're going to have to attract African-American voters and we're going to have to attract Hispanic voters, Asian voters, and others."
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