Cruz campaign claims North Dakota delegates
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The 25 national delegates selected by North Dakota Republicans on Sunday reportedly include a handful who have said they would vote for GOP presidential candidate Ted CruzRafael (Ted) Edward CruzTed Cruz: 'Fox News went all in for Trump' 2 Republican senators introduce resolution to label antifa as domestic terrorists Ted Cruz: Trump's chances of winning reelection are '50-50' MORE, CNN reported Sunday.

North Dakota Republicans on Sunday picked a slate of 25 national delegates from a larger list of nominated delegates. The delegates will be unbound at the Republican National Convention in July, meaning they can vote for whomever they want.

The delegates include Gov. Jack Dalrymple, first lady Betsy Dalrymple, Attorney General Wayne Stenehjem and top party donors.

NBC News reported that some of those chosen are undecided.

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Cruz lobbied in person at the North Dakota event, unlike his two rivals. 

"I'm thrilled to have the vote of confidence of Republican voters in North Dakota who delivered such a resounding victory today," Cruz said in a statement, according to CNN.

"As I met them over the weekend, North Dakota Republicans recognized that I am the only candidate who can move this country forward by protecting freedom and liberty. Whether we defeat Donald TrumpDonald John Trump5 things to know about Boris Johnson Conservatives erupt in outrage against budget deal Trump says Omar will help him win Minnesota MORE before the convention or at it, I'm energized to have the support of the vast majority of North Dakota delegates."

His rival campaigns sent people to to the gathering on their behalf. Ben Carson attended the event on behalf of front-runner Donald Trump, who the retired neurosurgeon and former presidential candidate endorsed.

North Dakota Rep. Kevin Cramer endorsed Trump on Sunday. He said it's something he's been "processing for a long time."

"It really culminated with my online straw poll, where I really did want to give voice to the people who can't be here," he said, according to CNN.

All three Republican campaigns worked to secure supporters at the convention. Trump's senior adviser Barry Bennett said many on the list of 25 preferred delegates were leaning toward Trump, noting they'd be "drinking champagne here all day" if that list passed in the convention.

Trump's campaign manager tweeted Sunday, calling the results a victory for Trump. 

Kasich's campaign also said Saturday the slated list of 25 looked good for their campaign.