In surveys leading up to Super Tuesday's nomination battles in 24 states, the Republican race is showing a pretty strong trend toward Arizona Sen. John McCain while Hillary Clinton leads in a mixed bag in the Democratic contests.

According to RealClearPolitics polling averages in 11 of the 21 states holding Republican nomination contests, McCain is ahead in all but one state: Massachusetts, the state where rival Mitt Romney once held the governor's seat. Romney is leading in that polling average by 22. 2 percentage points.

McCain's widest margin is in New York, where he leads Romney by 31 percentage points.

Republican hopeful Mike Huckabee does not hold the lead in any of the polling averages, but he edges out Romney for second place in Missouri, Tennessee and Alabama.

Click here to see GOP polling averages for Super Tuesday states on RealClearPolitcs.com.

Twenty-two states will hold Democratic nomination battles, and RealClearPolitics averaged polls in 12 of the 22 states.  Clinton is ahead in 10 of those states. Barack Obama takes the other two.

Clinton's biggest average lead over Obama is in her home state of New York, where the average puts her 17 points ahead. In delegate-rich California, Clinton only holds a negligible 0.2 percent lead where she once led by double digits.

In Obama's home state of Illinois, he holds a 30 percentage point lead over Clinton. He also leads her in Georgia by a comfortable 15-point margin.

Click here to see Democratic polling averages for Super Tuesday states on RealClearPolitics.com.

The RealClearPolitics averages don't show trends, but state-by-state analysis can zero in on the changes happening. In several of the states, the underdogs are surging just ahead of Tuesday's big battle, and though it may not be enough to claim victory, the proportional allocation of delegates means no candidate is likely to walk away with the party nomination.