The European Union has more work to do, experts say, if it hopes to seal a transatlantic trade deal that has been criticized for leaving governments open to international legal action from companies affected by changes to tax and regulation. The European Commission, the EU’s executive arm, is right now negotiating a trade and investment treaty with the United States – the Transatlantic Trade and Investment Partnership (TTIP) – that it says could add 119 billion euros annually to Europe’s economy and 95 billion euros to the U.S. economy.