Carry The Mail Meaning

Example : 1986 Jan. 8, Keith Schneider, "Agriculture Chief to Quit: Reagan Hails Block Tenure," New York Times (retrieved 5 March 2014):  "My objective was to carry the mail for the President, working with the Congress, forging that new bill."2011 April 12, Kent Wilson, "Sidney Crosby's historic season," ESPN.com (retrieved 5 March 2014):  To say the Pittsburgh Penguins are a top-heavy club is an understatement. . . . The club is therefore completely reliant on Crosby and Co. to carry the mail up front.2012 June 28, "Dallas Cowboys," Sports Illustrated (retrieved 5 March 2014):  The coaches will say, "We have two starters at running back," but the guy who'll carry the mail is DeMarco Murray.