New bankruptcy filings show that billionaire Carl Icahn is willing to invest $5 million to help keep the Trump Taj Mahal open. The additional revenue would help keep the casino open till the end of Jan. Icahn has said he needs concessions from the labor union and state aid to make a larger investment to keep the casino open. The casino is efforting to ensure the judge allows the casino to stay open and avoid Chapter 7 liquidation, which the judge is open to the possibility.