Democratic and Republican presidential candidates used the occasion of the 43rd anniversary of the Supreme Court’s 1973 Roe vs. Wade decision legalizing abortion nationwide and Friday’s March for Life to air their thoughts on one of the nation’s most controversial social issues.

Days after referring to Planned Parenthood as the “establishment” for its endorsement of Hillary Clinton in the fight for the Democratic presidential nomination, Vermont Sen. Bernie Sanders tweeted Friday, “I join with Planned Parenthood, NARAL and all Americans who have been fighting the never-ending attacks on women’s right to choose.”

It was one of a series of tweets from Sanders on the day thousands gathered in Washington for the March for Life on the 43rd anniversary of the Roe v. Wade decision.

Texas Sen. Ted Cruz, a leading Republican presidential candidate, voiced his support for pro-life demonstrators and his prayers for the country.

Meanwhile, former Hewlett-Packard CEO Carly Fiorina was the only presidential candidate who spoke at the March for Life, which came just ahead of a major snowstorm in Washington.

Florida Sen. Marco Rubio tweeted out a new ad, where he said, “The right to life is a human right.”

Retired neurosurgeon Ben Carson pointed to his professional life to demonstrate, “I have spent my whole life as a pro-life advocate.”

Meanwhile, former Florida Gov. Jeb Bush applauded the marchers and said, “As president I’ll fight for human dignity.”

Former Maryland Gov. Martin O’Malley said he would be a defender of abortion rights, citing his record leading his state.

Not weighing in on Twitter were leading Democratic presidential candidate Hillary Clinton, endorsed by Planned Parenthood, and leading Republican presidential Donald Trump, who has had conflicting positions on abortion.

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