The non-partisan Campaign Legal Center, for instance, stressed again on Thursday that the company should make the ads public, "so that everyone can see the nature and extent of the use of Facebook accounts by Russian Federation".
Facebook, which had said as recently as July that it had found no evidence of fraudulent Russian ad purchases, reversed itself this month and said it had removed 470 profiles and pages that it said were linked to the Internet Research Agency, a Russian company with ties to the Kremlin.
He also listed some steps that can help avert manipulation of the social network including more transparency on political ads that appear on Facebook.
"I don't want anyone to use our tools to undermine democracy", CEO Mark Zuckerberg said in a Facebook video and wrote in an accompanying post. But Facebook still won't release them to the public. That is an assessment that can be made only by investigators with access to classified intelligence and information from all relevant companies and industries - and we want to do our part.
CEO Mark Zuckerberg said his company will require political ads to disclose who is paying for them.
This is not the first time the Facebook boss has jumped to the company's defence over its role in the U.S. election past year.
One of the major reasons why this interference came out later is because most users who post ads on Facebook using Self-Service tools.
Towards the end of the 2016 elections, Facebook was accused of running Russian disinformation.
Facebook is handing 3,000 adverts to Congress, buckling under public pressure after it revealed that a Russian propaganda organisation paid $100,000 (£74,000) for political advertising on its platform before Donald Trump's election.
"I wish I could tell you that we're going to be able to stop all interference, but that just wouldn't be realistic".
The social network's chief executive, Mark Zuckerberg, said the company is "actively working" with the U.S. government in its ongoing Russian Federation investigations. If it didn't share this information with Congress, people may have accused it of putting its interests ahead of the integrity of presidential elections. The changes will include hiring new employees around the world focused on election integrity and providing users with a hub where they can track political ads and who funds them.
"We won't catch everyone immediately, but we can make it harder to try to interfere".
Facebook's 2016 revenues were $27.6 billion, which equates to almost $14 for each of the platform's claimed two billion monthly users. "We're going to bring Facebook to an even higher standard of transparency".
The announcement comes one day after 20 Democratic senators and representatives wrote to the Federal Election Commission to urge it "develop new guidance" for advertising platforms "to prevent illicit foreign spending in USA elections". The accounts or pages that violated the Facebook policies were shut down.