Facebook executive Sheryl Sandberg said Thursday she disagrees with Twitter's decision to block a pro-life ad from Tennesee Rep. Marsha Blackburn, and said Facebook would've allowed the ad to run.

"The question is should divisive political or issue ads run?" Sandberg, Facebook's chief operating officer, said during an event hosted by Axios. "Our answer is yes because when you cut off speech for one person, you cut off speech for other people."

Blackburn, a Republican, is running for the Senate next year and her campaign attempted to run a digital ad on Twitter announcing her candidacy. Twitter blocked the ad from appearing on the site because it included a claim about abortion the company said was an "inflammatory statement that is likely to evoke a strong negative reaction."

Twitter was referring to a line in the ad in which Blackburn says she "fought Planned Parenthood, and we stopped the sale of baby body parts, thank God," a reference to her work on the Select Investigative Panel on Infant Lives.

An official with Twitter notified Blackburn's vendors the ad would not run on the platform unless they omitted the line "stopped the sale of baby body parts."

When asked if Twitter made a mistake in blocking the ad, Sandberg said any platform should allow issue-based advertisements "even when they're hard."

"The responsibility of an open platform is to let people express themselves," she said. "We don't check the information people put on Facebook before they run it, and I don't think anyone should want us to."