French transport group Alstom (ALSO.PA) is set to win a $2.5 billion contract to build the next generation of high-speed trains for U.S. rail operator Amtrak, U.S. Senator Charles E. Schumer said. Alstom on Tuesday welcomed the news of the possible contract, which Schumer announced on Monday in a statement published on his website. Alstom did not make any comment about the negotiations or the type of trains.