Sen. Mitch McConnell has been the Minority Leader of the Senate since January 3, 2007 and is the longest serving U.S. Senator in Kentucky history, but he's facing tough re-election battles heading into 2014. On this week's Open Mic, he talks about the challenges associated with passing a new farm bill and why going back to the 1949 permanent law would be "insane." In this wide-ranging interview, he also addresses a host of other ag-related issues such as immigration reform, estate taxes, the sequester, Obamacare and the "war on coal."Senator Mitch McConnell