Duscha moved to Washington, D.C., in 1947 and worked for Congressional Quarterly, the Democratic National Committee, Labor's League for Political Education of the old American Federation of Labor and The Machinist, a newspaper published by the International Association of Machinists.
While working in Illinois, Duscha was awarded a Nieman Fellowship at Harvard University for the 1955–56 academic year.
From 1958 to 1966 Duscha worked for the Washington Post as an editorial writer, a reporter and a national correspondent specializing in political coverage.
He wrote a syndicated column on public affairs and has contributed to New York Times Sunday Magazine, The Washingtonian, Harper's and The Atlantic.
His published books include Taxpayer's Hayride: The Farm Problem; From the New Deal to the Billie Sol Estes Case, and Arms, Money and Politics.