Nearly immediately, Twitter shut down the ad except for the original tweet from Blackburn's campaign account, claiming the pro-life part was "inflammatory" and would evoke a negative response. The ad was apparently blocked because Blackburn boasts in it that she "stopped the sale of baby body parts".
Advertising on Twitter has its advantages for campaigns - it's much cheaper and can be more highly targeted than TV ads.
Added Miller, "There is a fantastic candidate who's running to replace Sen".
Blackburn is competing for the seat formerly occupied by Bob Corker, who plans to retire from the Tennessee Senate next year.
"Twitter shut down our announcement video ad, claiming it was "inflammatory" & 'negative.' Silicon Valley should not be allowed to impose their values on us", she wrote on Facebook.
Blackburn's says: "I'm 100 percent pro-life".
Liz Cheney, daughter of former Vice President Dick Cheney and now the Congressional representative for the state of Wyoming, urged her Twitter followers to retweet an Associated Press report about the matter "to tell @twitter: planned parenthood did sell baby body parts & it's wrong to ban @VoteMarsha from saying so".
A Senate campaign video ad by Republican Congresswoman Marsha Blackburn is being blocked by Twitter, due to an "inflammatory statement that is likely to evoke a strong negative reaction". They edited the videos to make it appear as if Planned Parenthood employees were interested in this deal.
Blackburn is referencing a misleading line of attack conservatives used against Planned Parenthood in 2015, falsely claiming the women's health care provider was profiting from the sale of fetal tissue research.
Donating the tissue is legal, with consent from the woman, but selling it is illegal in the U.S. Clinics are allowed to recover some costs, like handling and shipping.
Blackburn responded to Twitter's decision by calling on her supporters to join her in "standing up to Silicon Valley".
Twitter is likely correct that the statement will be found "inflammatory", despite the fact that Blackburn was indeed correct about the abortion industry - her committee discovered evidence of pervasive illegal activity on the part of many abortion clinics and biotech firms. "It's something that people wanted to see shut down".
Twitter has not publicly said why it removed the ad campaign.