If true, such action by Facebook may constitute a major violation of federal campaign finance law as an illegal corporate campaign contribution. A federal law bans corporations from making “direct or indirect” contributions to federal candidates. For example, if a corporation decided to offer a presidential candidate free office space, that would violate federal law. What about the story currently in the news about Cambridge Analytica using Facebook data for the Trump campaign? From the standpoint of federal campaign finance law, the Trump campaign met its obligation to pay for and report this spending and did not violate the ban on corporate contributions.

Source: Fox News March 26, 2018 19:16 UTC