Former Arkansas Gov. Asa Hutchinson (R) and former New Jersey Gov. Chris Christie (R) are set to be absent from the Maine Republican primary ballot.

Though polling near the bottom, the two most outspoken anti-Trump candidates have refused to throw in the towel, even after higher-polling candidates like Sen. Tim Scott (R-SC) and former Vice President Mike Pence dropped out. The two underdogs now face another obstacle; the Maine GOP has excluded them on the state's primary ballot. The state's Republican Party claims that both candidates failed to reach the 2,000 signature threshold required to land on the ballot.

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Maine's Republican Party told Christie that he only collected 844 valid signatures in the state, but the former governor disputes this and wrote it off as a procedural error.

“The campaign collected and submitted over 6,000 signatures,” a Christie campaign spokesperson told CBS News. “This is simply a procedural issue with the way they reviewed signatures and is under appeal.”

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Adding insult to injury, a relatively unheard-of candidate, Pastor Ryan Binkley, who doesn't register on most polls, obtained enough signatures to land on the ballot. Former President Donald Trump, Gov. Ron DeSantis (R-FL), former United Nations Ambassador Nikki Haley, entrepreneur Vivek Ramaswamy, and Gov. Doug Burgum (R-ND) will also appear on the ballot.

On the Democratic side, author Marianne Williamson failed to make the primary ballot.