SurveyUSA released polls of four states showing head-to-head match-ups of Hillary Clinton and Barack Obama against the top four Republican contenders, Rudy Giuliani, John McCain, Mitt Romney and Mike Huckabee. The survey did not test Democrat John Edwards or Republican Fred Thompson.

The results from Minnesota, Wisconsin, Ohio and Missouri are somewhat of a mixed bag, but some findings stand out.

– Clinton wins the GOP match-ups in the four states more than Obama. She is ahead in Minnesota against all four Republicans by 9 points or more; she beats all four in Wisconsin, though by smaller margins; she is tied with McCain in Ohio but comfortably ahead of the rest; and, in Missouri, outruns all four Republicans but by six or less points, and by only two points over Huckabee, who was governor of neighboring Arkansas.

– Obama beats the Republican field in Minnesota except for McCain; barely edges McCain in Wisconsin; runs behind Giuliani and McCain in Ohio; and loses narrowly to Huckabee in Missouri while besting the rest of the GOP candidates.

– The Republican who runs worst in the four states is Romney.