Senate Minority Leader Mitch McConnell (R-KY) speaks with Josh Holmes (L), the Chief of Staff of his office, at the U.S. Capitol in Washington December 31, 2012. The United States was on track to tumble over the "fiscal cliff" at midnight on Monday, at least for a day, as lawmakers held back from supporting an eleventh-hour plan from Senate leaders to avert severe tax increases and spending cuts. REUTERS/Mary F. Calvert (UNITED STATES - Tags: POLITICS BUSINESS)