For the presidential election 2020, the social networking portals are taking very serious actions, especially on the ad campaign. We already knew the long list of facebook where they announce new measures for democratic rights.
Jack Dorsey, co-founder and CEO of Twitter, tweeted that they have made the decision to stop all political advertising on twitter globally. They believe, political decision, the democratic opinion should not be imposed on money or do buy/sell a trading thing. That should be earned and twitter, as one of the leading social networking services in the world, will never allow so.