Nope. There was never any concerted effort to ban Mortal Kombat in the US, and Hillary Clinton was not involved with it. You may be thinking about Tipper Gore,

Nope. There was never any concerted effort to ban Mortal Kombat in the US, and Hillary Clinton was not involved with it. You may be thinking about Tipper Gore, who was part of the campaign in the '80s that resulted in the infamous "Parental Advisory - Explicit Content" label on records.