Latest Pew Polling (read the entire article for other good info):
[i]For his part, McCain runs better in the general election tests against both Democratic candidates among college graduates and white men. More generally, the current poll finds that McCain’s competitiveness against both Democrats is buttressed by the fact that voters continue to see him as a centrist whose views are fairly close to their own, and less conservative than George W. Bush’s. In contrast, voters place both Clinton and Obama considerably to the left of where they place themselves. These ideological perceptions of the candidates have changed little over the past three months.
While McCain is seen as more centrist than the Democratic candidates, he does not inspire as much confidence as either of them does to handle the issue voters would most like to see the candidates address: the economy. By wide margins, voters choose either Obama or Clinton as better able than McCain to improve economic conditions.
Yet voters have much more confidence in McCain than either Democrat to defend the country against future terrorist attacks. McCain’s advantage over Obama is particularly large. By 63% to 26%, more voters say McCain rather than Obama would do a better job of handling terrorism, which is a far greater margin than Bush ever enjoyed over John Kerry on this issue. [/i]