Another presidential candidate has joined real estate mogul in promoting the ridiculous notion in questioning Cruz's eligibility: former Arkansas Gov. Mike Huckabee (R).

On Thursday's CNN's "Erin Burnett OutFront," Huckabee said, "I didn’t think it was an issue until I started seeing extensive and thoroughly detailed articles from constitutional law professors with strong credibility saying that this is an issue. I think Senator Cruz needs to settle it. The RNC has no business telling him that he should step aside because there's a question. The issue is, answer the question. Settle it. Deal with it."

When pressed by Burnett on the fact that Cruz going to court over the issue would likely force him out of the primary race, Huckabee responded, "For me, it's real simple. I was born in Arkansas. We already have clearly established that you can be born in Hope, Arkansas, and be president of the United States."

Other candidates who have echoed Huckabee's sentiments include Sen. Rand Paul (R-Ky.), former HP CEO Carly Fiorina and former Sen. Rick Santorum (R-Pa.). With the exception of Trump, the common thread among these candidates is that they're polling in single digits, suggesting that they're resorting to Trump's ridiculous tactics out of desperation.

Given the fact that the birther line of attack is providing minimal damage, at worst, to Cruz's poll numbers, these candidates will have to find some other way to revitalize their campaigns.

Huckabee has bitterly resented Cruz for a long time, as Cruz became the darling of the evangelical crowd that used to support Huckabee. As far back as October 2014, Alice Stew­art, Hucka­bee’s spokes­wo­man and seni­or ad­viser, called Cruz a "cage rattler." She stated, “Ted Cruz is a cage rat­tler who likes to get out there and talk about lim­ited gov­ern­ment and de­fund­ing Obama­care and so on. But when it comes to con­nect­ing with the faith com­munity nobody does it bet­ter than Mike Hucka­bee. When it comes to ral­ly­ing so­cial con­ser­vat­ives, Ted Cruz doesn’t hold a candle to Mike Hucka­bee.”