The National Organization for Marriage has joined the effort to oust three Iowa Supreme Court judges who voted in favor of gay marriage.

The group, which contributed heavily to the campaigns to roll back gay marriage in Maine and California, announced Thursday that they will contribute $235,000 toward a statewide television and radio ad buy in support of the effort.

“The people of Iowa do not support gay marriage and are rightly outraged at the court's ruling last year concocting a new constitutional right and substituting their values for those of Iowa's citizenry,” NOM President Brian Brown said in a statement.

Voters will decide in November whether to keep Chief Justice Marsha Ternus and Justices David Baker and Michael Streit. The remaining four judges are not on the ballot this year.

The campaign to remove the judges kept a low profile until last month when former gubernatorial candidate Bob Vander Plaats announced plans to spearhead the movement. The Sioux City businessman has rented office space and hired six staffers to man his Iowa for Freedom campaign.

Vander Plaats, who came close to winning the Republican primary with a campaign that focused on social issues, including repeal of the court's unanimous April 2009 ruling that brought gay marriage to the Midwest, says the judges should be removed because they overstepped their authority.

“They voided the law and it should have gone back to the legislature,” he said on KCCI's Newsmakers. “We saw the Supreme Court go outside its jurisdiction. The legislature is responsible for creating all laws. [Iowa for Freedom] truly believes the [court] usurped the will of the people.”

“All power is inherent in the people, not the courts,” he added. “This is a great civics lesson on who makes law, executes law and amends the constitution.”

The campaign has the endorsement of three Republican 2012 presidential hopefuls. Minnesota Governor Tim Pawlenty, former House Speaker Newt Gingrich and former Pennsylvania Senator Rick Santorum are in favor of axing the judges for deciding in favor of gay marriage.

But retired Supreme Court Justice Sandra Day O'Connor has spoken out against the effort, stressing the need for courts to remain free from politics.