Republican Senate candidate said she was 'a little nervous' but also optimistic about the Delaware GOP primary, set for Tuesday.

Wilmington, Delaware (CNN) - Delaware GOP Senate hopeful Christine O'Donnell voted Tuesday morning soon after the polls opened.

Saying "I feel very good today," O'Donnell added she was "a little nervous" but also optimistic.

Believing there are still a lot of undecided voters, she says she will leave "no stone" unturned and is planning to spend the rest of the day trying to find them and convince them to vote for her. O'Donnell is going to visit other precincts as well make calls to voters while in the car.

We are "trying to make sure every undecided I ask for their vote," she told reporters.

"We are not in this to lose by 100 votes."