WASHINGTON - Tuesday could be the final stop of Newt Gingrich's wild ride of a presidential campaign.

The Republican candidate told NBC News he would reassess his candidacy depending on his finish in Delaware, one of five northeastern states holding presidential primaries Tuesday, and the state where Gingrich has campaigned most heavily.

"I think we need to take a deep look at what we are doing," Gingrich told NBC in an interview on Monday.

Those comments came as Republican front-runner Mitt Romney visited New Hampshire, preparing to deliver what the former Massachusetts governor's aides are billing as his first address of the general election campaign against Democratic President Barack Obama.

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