sentences:  However, the end of Reconstruction in 1876 marked a weakening of black rights and by 1901, when George Henry White left the House after losing a reelection bid, there were no African Americans left in Congress.In 1929, Oscar Stanton de Priest became the first African American congressman since White.He and his successor, Arthur W. Mitchell, spent their tenure as the only African Americans in Congress while representing a majority-black House district in Chicago.