Ken Griffin, Chicago billionaire, pledges millions to Marco Rubio campaign

Republican presidential hopeful Sen. Marco Rubio, R-Fla., speaks to members and guests of the Council on Foreign Relations, Wednesday, May 13, 2015, in New York. (AP Photo/Mary Altaffer)

Chicago billionaire Kenneth Griffin is promising several million dollars to the presidential campaign of Marco Rubio.

Griffin, a hedge fund manager, said the Republican senator from Florida has the best vision of where the country needs to go.
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