Story highlights All the remaining New Hampshire staff of Ben Carson's PAC resigned from their posts and publicly endorsed the Texas Republican

Pimm said he believes his switch and the departure of the other staff shows a rising tide for Cruz in New Hampshire

Washington (CNN) One of Ben Carson's top New Hampshire supporters is officially switching his allegiance to Republican presidential rival Ted Cruz, saying Carson no longer has a chance to win.

Sam Pimm, a veteran conservative New Hampshire operative, previously served as executive director of the pro-Carson super PAC the 2016 Committee, but officially made the swap on Sunday, he told CNN.

Politico and WMUR were first to report the news.

Also Sunday, all the remaining New Hampshire PAC staff resigned from their posts and publicly endorsed the Texas Republican.

Though Pimm left his post at the Carson-supportive super PAC before then, he had remained loyal to Carson until this weekend.

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