U.S. Republican presidential candidate Mitt Romney, fresh from six wins on “Super Tuesday,” says he is pleased with all the support he has received and that he is fighting on for the party nomination.

Romney is far ahead in the number of delegates needed to secure the nomination, but has failed to attract support from working-class voters and religious conservatives, who have been drawn to his main rival, Rick Santorum.

Romney told CNBC Wednesday that he is “encouraged” by all the support he has received across the party and that he is “prepared to fight all the way” to become the nominee.

The former Massachusetts governor won six of the 10 states that held nominating contests Tuesday, including a narrow victory in the crucial battleground state of Ohio.

The win in Ohio over Santorum, a former U.S. senator, was by less than 1 percentage point. Romney also secured victories in Alaska, Idaho, Massachusetts, Virginia, and Vermont.

More than one-third of the 1,144 delegates needed to win the Republican nomination were up for grabs Tuesday — more than all of the previous primaries and caucuses combined.

Santorum won races Tuesday in North Dakota, Oklahoma, and Tennessee, in hopes of regaining the momentum that helped him win three states in one day in last month. He turned his attention Wednesday to Kansas and Mississippi. Kansas holds a caucus Saturday, while Mississippi holds a primary next week.

Former U.S. House speaker Newt Gingrich won Georgia, the southeastern state he represented in Congress for two decades. He focused his efforts Wednesday on Alabama, ahead of a primary there next week.

U.S. Representative Ron Paul, who has yet to win a nominating contest, is campaigning in Kansas Friday ahead of its caucus.

The Republican Party will formally nominate its presidential candidate at its convention in Tampa, Florida, in late August. The eventual nominee will face President Barack Obama, a Democrat, in the November election.