 The event was officially announced on March 7, 2007, to replace The International, which tour officials had abruptly cancelled four weeks earlier on The National was a standard 72-hole stroke play event, and did not use the modified Stableford scoring system used by The International in Colorado.The D.C. area had hosted a regular tour event for over a quarter century; the Kemper Open arrived in 1980, but was terminated after the 2006 event.It was played at Congressional from 1980 to 1986, then moved to the nearby TPC at Avenel in 1987.