Also, the Obama 2008 and 2012 campaign committees presumably were dissolved years ago, so other than suing Facebook, there's no one to sue, even if the statute

Also, the Obama 2008 and 2012 campaign committees presumably were dissolved years ago, so other than suing Facebook, there's no one to sue, even if the statute of limitations wasn't an issue. There are exceptions that vary between jurisdictions with regard to the Statute of Limitations, but you may be right that it has expired and there may be nothing that can be done. If that issue can be overcome, you may also be right that the Obama committees are gone, however Facebook has plenty of money to go after.