(WASHINGTON) -- A number of senior aides working on Newt Gingrich's presidential campaign resigned Thursday.
Former Gingrich for President spokesman Rick Tyler tells ABC News that he and "the senior leadership team of the campaign" have left, largely because their candidate, former House Speaker Newt Gingrich, refused to aggressively campaign.
The senior leaders include Tyler, campaign manager Rob Johnson, senior strategists Sam Dawson and Dave Carney, South Carolina consultant Katon Dawson, and Iowa consultant Craig Schoenfeld.
Tyler and Dawson have been with Team Gingrich for years.
"We had a fundamental difference of opinion about the direction of the campaign," Tyler told ABC News. Specifically, he said, about "whether Newt's schedule would allow him to spend enough time in the states he needs to win."
Asked if Gingrich's recent cruise to Greece was the tipping point, Tyler said "that wasn’t helpful."
Tyler said he admired Gingrich and thinks he'd make "a terrific president."
"Key people were going to leave," but Tyler "held out hope we could change direction. I want him to do what it takes to win."
Ultimately the team could not prevail upon Gingrich to do that, and revive his campaign, Tyler said.
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