Failed GOP presidential candidate and former U.S. Sen. Rick Santorum (R-Pa.) joined conservative website WorldNetDaily on Sunday as the newest member of its commentary team, kicking off the endeavor with a column about a United Nations treaty that he has vocally opposed over the past months.

WND, a site widely known for its public promotion of conspiracy theories about President Barack Obama being ineligible to serve in the White House, announced the move in a post on Sunday. Hours later, it published Santorum's first column in a series that is expected to be published every Monday.

In his article, Santorum warns of the "troubling implications" that lie within the U.N. Convention on the Rights of Persons with Disabilities. He expresses concern that a particular passage could lead to the government taking away the rights of parents such as the Santorums, whose 4-year-old daughter Isabella was born with the rare disability Trisomy 18, to determine what is in "the best interest" of their children.

He made a similar argument during testimony on Capitol Hill last month.

Santorum's latest foray back into the political spotlight comes on the heels of recent candid comments about his potential future presidential aspirations.

Asked by the Weekly Standard if he was considering another White House run, Santorum responded, "I'm open to it, yeah."

"I think there's a fight right now as to what the soul of the Republican party's going to be and the conservative movement, and we have something to say about that," he added. "I think from our battle, we’re not going to leave the field."

He's also made clear that he would maintain his brand of social conservatism through his organization, Patriot Voices, and now through his WND contributions. Some have argued that it will be increasingly difficult to stake a presidential platform upon cultural issues, especially in the wake of an election that showed high levels of support for Obama among millennials, women and gay voters. If Santorum were to run on such a platform, he'd be putting those trends to the tests.

Also on HuffPost:

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  • On Contraception

    "It's not okay. It's a license to do things in a sexual realm that is counter to how things are supposed to be." <a href="http://thinkprogress.org/health/2011/10/19/348007/rick-santorum-pledges-to-defund-contraception-its-not-okay-its-a-license-to-do-things/" target="_hplink">Think Progress, 2011</a>

  • On The Definition Of Marriage

    "Marriage is what marriage is. Marriage was around before government said what it was. It's like going out and saying, 'That tree is a car.' Well, the tree's not a car. A tree's a tree. Marriage is marriage." "It's like handing up this and saying this glass of water is a glass of beer. Well you can call it a glass of beer, it's not a glass of beer, it's a glass of water. And water is what water is. Marriage is what marriage is." "I can call this napkin a paper towel, but it is a napkin. Why? Because it is, what it is." <a href="http://iowaindependent.com/60602/santorum-qa-marriage-for-gays-threatens-religious-freedom" target="_hplink">Iowa Independant, 2011</a> <a href="http://www.youtube.com/watch?feature=player_embedded&v=fLbAFNbVSEE http://thinkprogress.org/lgbt/2011/08/09/292121/santorum-marriage-is-like-water-not-beer/" target="_hplink">Think Progress, 2011</a> <a href="http://www.youtube.com/watch?v=U394HKpak1s" target="_hplink">MSNBC, 2011</a>

  • On Sex In The Military

    "I -- I would say, any type of sexual activity has absolutely no place in the military. And the fact that they're making a point to include it as a provision within the military that we are going to recognize a group of people and give them a special privilege to -- to -- and removing 'don't ask, don't tell' I think tries to inject social policy into the military. And the military's job is to do one thing, and that is to defend our country." <a href="http://www.foxnews.com/politics/2011/09/22/fox-news-google-gop-2012-presidential-debate/" target="_hplink">Fox News, 2011</a>

  • On Gays In The Military

    "The problem is that sexual activity with people who you are in close quarters with who happen to be of the same sex is different than being open about your sexuality ... They're in close quarters, they live with people, they obviously shower with people." <a href="http://www.huffingtonpost.com/2011/10/09/rick-santorum-gay-soldiers-shower-dadt_n_1002244.html" target="_hplink">HuffPost, 2011</a>

  • On Polygamy, Bigamy, Adultery ...

    "If the Supreme Court says that you have the right to consensual sex within your home, then you have the right to bigamy, you have the right to polygamy, you have the right to incest, you have the right to adultery. You have the right to anything." <a href="http://articles.cnn.com/2003-04-22/politics/santorum.gays_1_statement-on-individual-lifestyles-senator-santorum-bigamy-and-adultery?_s=PM:ALLPOLITICS" target="_hplink">Associated Press, 2003</a>

  • On The Difference Between Being Black And Being Gay

    "You are black by the color of your skin. You are not homosexual, necessarily -- obviously, by the color of your skin. [...] The idea that being black and being gay is the same is simply not true." <a href="http://politics.foxnews.mobi/quickPage.html?page=23681&content=58208053&pageNum=-1" target="_hplink">Fox News, 2011</a>

  • On Candidates' Sex Lives

    "When you look at someone to determine whether they'd be the right person for public office, look at who they lay down with at night and what they believe in." <a href="http://2012.talkingpointsmemo.com/2011/10/rick-santorum-when-selecting-candidate-look-at-who-they-lay-down-with-at-night.php" target="_hplink">Talking Points Memo, 2011</a>

  • On 'Man On Dog'

    "In every society, the definition of marriage has not ever to my knowledge included homosexuality. That's not to pick on homosexuality. It's not, you know, man on child, man on dog, or whatever the case may be. It is one thing." <a href="http://www.usatoday.com/news/washington/2003-04-23-santorum-excerpt_x.htm" target="_hplink">Associated Press, 2003</a>

  • On Sodomy, etc..

    "Whether it's polygamy, whether it's adultery, whether it's sodomy, all of those things, are antithetical to a healthy, stable, traditional family." <a href="http://www.usatoday.com/news/washington/2003-04-23-santorum-excerpt_x.htm" target="_hplink">Associated Press, 2003</a>

  • On The Government Getting Up In Your Sex Life

    "The idea is that the state doesn't have rights to limit individuals' wants and passions -- I disagree with that. I think we absolutely have rights because there are consequences to letting people live out whatever wants or passions they desire. And we're seeing it in our society." <a href="http://www.usatoday.com/news/washington/2003-04-23-santorum-excerpt_x.htm" target="_hplink">Associated Press, 2003</a>

  • On Gay Marriage

    "This is an issue just like 9/11 ... We didn't decide we wanted to fight the war on terrorism because we wanted to. It was brought to us. And if not now, when?" "The battle we're engaged in right now on same-sex marriage, ultimately that is the very foundation of our country, the family, what the family structure is going to look like. I'll die on that hill fighting." <a href="http://articles.mcall.com/2004-02-25/news/3521981_1_gay-marriage-defense-of-marriage-act-amendment-process" target="_hplink">The Morning Call, 2004</a> <a href="http://thinkprogress.org/lgbt/2011/10/19/348059/rick-santorum-pledges-to-die-on-the-hill-fighting-against-same-sex-marriage/" target="_hplink">Think Progress, 2011 </a>

  • On Being A Hater

    "You can say I'm a hater. But I would argue I'm a lover. I'm a lover of traditional families and of the right of children to have a mother and father. ... Isn't that the ultimate homeland security, standing up and defending marriage?" <a href="http://www.post-gazette.com/pg/04197/346633-84.stm" target="_hplink">Pittsburg Post Gazette, 2011</a>

  • On The Gay Jihad

    "So the gay community said, 'He's comparing gay sex to incest and polygamy, how dare he do this,' and they have gone out on a, I would argue, jihad against Rick Santorum since then." <a href="http://thehill.com/blogs/blog-briefing-room/news/178543-santorum-gay-community-on-jihad-against-me-for-stance-on-marriage?utm_campaign=briefingroom&utm_source=twitterfeed&utm_medium=twitterfeed" target="_hplink">The Hill, 2011</a>