Former presidential candidate Mike Huckabee on Thursday warned that failure to stop gay marriage will unleash God's judgment on the United States.

Huckabee, a former Republican governor of Arkansas who can be seen regularly on Fox News, made his comments as the last speaker at the National Organization for Marriage's (NOM) March for Marriage.

“The president and the Congress are not required to defy natural law,” Huckabee told the crowd. “They are not required to redefine marriage. They are required to follow the will of the people, the Constitution, and the law that has given us the greatest nation on Earth. A nation that we will lose, if we turn our backs on our origins.”

“There is no doubt in my mind that this country would not exist had it not been for the providential hand of God. And I'm also convinced that if we reject his hand of blessing, we will feel his hand of judgment.” (The video is embedded on this page. Visit our video library for more videos.)

An estimated 2,000 people gathered in the nation's Capitol for NOM's second annual rally and march to the steps of the Supreme Court. Equality Matters' Luke Brinker described the turnout as “dismal.”

“As he did for last year's event, anti-equality State Sen. Ruben Diaz (D-NY) bused in a large group of mostly Spanish-speaking evangelicals from the New York area, after promising rally-goers an expense-free trip to Washington to 'visit the monuments,'” Brinker reported.

(Related: At NOM's anti-gay marriage rally, Brian Brown claims “right side of history.”)