 Pete Seeger and Lee Hays were called to testify before the House Un-American Activities Committee in 1955.Despite this, a Christmas Weaver reunion concert organized by Harold Leventhal in 1955 was a smash success and the Vanguard LP album of that concert, issued in 1957, was one of the top sellers of that year, followed by other successful albums.Folk music, which often carried the stigma of left-wing associations during the 1950s Red Scare, was driven underground and carried along by a handful of artists releasing records.