Gingrich attended public events in Raleigh, Wilson, Charlotte, and Greensboro - speaking at two "tax day" rallies, the Wilson County Republican Party election-year kickoff, and taking a tour of the NASCAR Hall of Fame.
Gingrich said he still planned to keep campaigning, although acknowledging Mitt Romney was the GOP's likely nominee. Asked at the event in Wilson Saturday if his continuing to campaign was damaging Romney, Gingrich said no.
"If he can't stand up to a little competition, then he shouldn't be in the race," he said.
Speaking on the mall outside the North Carolina Legislature in Raleigh later, he lashed out against President Barack Obama.
"We're paying too much for gasoline, too much for government, and we have too few jobs," he told supporters.
Gingrich is targeting North Carolina voters like Tea Party activist Denis Stetter who came out to listen.
"He's one of the most informed candidates I've ever listened to, since I became politically aware and active," said Stetter.
The North Carolina Republican presidential primary is May 8.