Twenty-five years ago, President Ronald Reagan signed the Agricultural Credit Act of 1987, which responded to the farm credit crisis and established the Federal Agricultural Mortgage Corporation. Since that time, "Farmer Mac" has served as the primary secondary market for agricultural loans with cumulative business volume exceeding $29 billion. On this week's Open Mic, CEO Tim Buzby explains how Farmer Mac has changed over the years and discusses the similarities and differences with other government-sponsored enterprises. He also shares his views on whats ahead for the agricultural economy and the potential for higher interest rates.Tim Buzby