Social media marketers take note. In light of the recent midterm elections, what do Foursquare, Twitter and Facebook all have in common? If you said that they all care deeply about democracy, wellâ€¦youâ€™d be wrong. (And if you said that they are all social media giants, well then, youâ€™d be Captain Obvious). The answer? They all know how to leverage a social event and they know how to make themselves useful.