Exclusive: U.S. states join Dow-DuPont merger probe - sources

U.S. state attorneys general have joined a federal antitrust probe of the planned merger between DuPont and Dow Chemical Co , according to three people familiar with the matter, heightening risks to a deal that could help reshape the global farm industry. A separate group of state attorneys general are expected to join a probe of Bayer AG's $66 billion plan to buy Monsanto Co , one of the sources said. The involvement of the state attorneys general increases scrutiny of the mega deals and will c