December 18, 2012

FILE - In this July 22, 2000 file photo, Iowa Democratic U.S. Sen. Tom Harkin, right, looks over the shoulder of Paul Dunfee, a hot mill operator, while touring PMX Industries in Cedar Rapids, Iowa. Jin Roy Ryu, a South Korean businessman who runs the metals company that supplies the U.S. Mint, gave $500,000 to a university institute honoring U.S. Sen. Tom Harkin, who is pushing for a dollar coin that could generate tens of millions of dollars in new business for the company, according to records obtained by The Associated Press.