OTTAWA - A Conservative MP says anti-abortion activists need to support political candidates who share their views if they want abortion laws changed.

Rob Anders, a self-described pro-life Tory, says members of Parliament who have taken stands against abortion will face an uphill battle to retain party nominations going into the next general election in 2015.

And he told a March for Life rally in Ottawa today that activists should recruit people to get involved in nomination meetings.

The call comes as organizers of the protest march accuse Prime Minister Stephen Harper of shutting down any debate on abortion.

Thousands of people have gathered on the lawn of Parliament Hill in what has become an annual ritual designed to raise the abortion issue at the national level.

The issue sparked controversy recently in the form of arguments over how and when MPs make member statements in the House of Commons.

Conservative MP Mark Warawa has complained that his rights to free speech were curtailed in March when he was told he'd been taken off a speaker's list provide by the Tory whip.

Warawa wanted to make a statement in the Commons a day after a motion he proposed condemning sex-selective abortion was deemed by a House committee to be ineligible for a vote.

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  • Jack Nicholson

    Jack Nicholson has said his pro-life stance stems from being born out of wedlock himself. His mother, a showgirl, became pregnant with him as a teenager and was encouraged to have an abortion but did not.

  • Kenny Chesney

    It would be no surprise to see any number of country stars on this list, but Kenny Chesney may have taken his pro-life stance an extra step. His 2003 single "There Goes My Life," about a teenager preparing to become a father, has been lauded as an anti-abortion, pro-fatherhood anthem.

  • Mel Gibson

    Mel Gibson told Barbara Walters in 1990 that he is opposed to birth control and abortion, saying, "God is the only one who knows how many children we should have, and we should be ready to accept them. One can't decide for oneself who comes into this world and who doesn't. That decision doesn't belong to us."

  • Patricia Heaton

    The Emmy-winning "Everybody Loves Raymond" actress has long been known as an outspoken Republican. In 1998 she became the honorary co-chair of Feminists for Life, a pro-life organization that aims to steer women away from choosing abortion.

  • Martin Sheen

    Martin Sheen, who portrayed Democratic president Jed Bartlet on "The West Wing," discussed his devout Catholic upbringing and conservative viewpoints on an Irish talk show in 2011. He specifically mentioned being pro-life, but that didn't stop him from <a href="http://www.huffingtonpost.ca/2012/10/27/martin-sheen-romney-stupid-arrogant_n_2030597.html">telling HuffPo that Mitt Romney is "stupid" and "arrogant."</a>

  • Ben Stein

    Before becoming an actor, Ben Stein was a speechwriter for presidents Richard Nixon and Gerald Ford. He's remained a well-known political and economic commentator and in 2003 was honored at the Tenth Annual Proudly Pro-Life Awards Dinner, hosted by the National Right to Life Educational Trust Fund.

  • Kathy Ireland

    Kathy Ireland rose to fame in the 1980s as a Sports Illustrated swimsuit model, but, like her political beliefs, much of her work has since been comparatively conservative. In 2011, Ireland was the keynote speaker at the Council for Life's annual luncheon, where she professed her religious beliefs and detailed her journey to becoming a pro-life supporter.

  • Kirk Cameron

    A former atheist, Kirk Cameron famously became a born-again Christian at 17 while starring on "Growing Pains," which he then insisted had plots that were too inappropriate. He's since been an incredibly outspoken Republican, receiving intense backlash from the the Hollywood community in 2012 when he told Piers Morgan that homosexuality is "unnatural ... and ultimately destructive to foundations of civilization." He is currently a member of the evangelical Christian movement and has espoused anti-abortion ideology.

  • Justin Bieber

    "I really don't believe in abortion," <a href="http://www.rollingstone.com/music/news/justin-bieber-talks-sex-politics-music-and-puberty-in-new-rolling-stone-cover-story-20110216">Justin Bieber told Rolling Stone</a> in 2011. "It's like killing a baby." When asked about cases of rape, the pop star said, "Um. Well, I think that's really sad, but everything happens for a reason. I don't know how that would be a reason. I guess I haven't been in that position, so I wouldn't be able to judge that."

  • Jim Caviezel

    Having portrayed Jesus Christ in Mel Gibson's "The Passion of the Christ," it seems only appropriate that Jim Caviezel has proclaimed himself to be a devout Catholic. The actor told Catholic Digest in 2009 that being pro-life is more important to him than his career.

  • Andrea Bocelli

    Andrea Bocelli first made his pro-life stance public in 2010 when he recorded a video discussing his mother's decision not to have an abortion even though she was encouraged to after coming down with appendicitis while pregnant. “Of course, personally I do not share the idea of being able to interrupt life arbitrarily,” <a href="http://www.telegraph.co.uk/culture/music/classicalmusic/8884646/Andrea-Bocelli-The-truth-about-my-friend-the-strong-willed-kind-and-intelligent-Silvio-Berlusconi.html">he told The Telegraph</a> in 2011. “But I cannot be the judge of those who decide in a different way. As much as I can, I show them an example and act as a role model, because I believe this is the only way.”