Question: The younger brother of Harvey Jewell served as the national chairman for which American political party?

Related documents: [0]  [DOC] Harvey Jewell (*May 26, 1820 – December 8, 1881) was a U.S. lawyer and politician who served as the Speaker of the Massachusetts House of Representatives from 1868 to 1871. Jewell was born in Winchester, New Hampshire on May 26, 1820, the first of ten children born to Pliny and Emily Alexander Jewell. His younger brother, Marshall Jewell (1825-1883) would later be elected Governor of Connecticut and would serve as President Grant's United States Postmaster General. [END] 
[1]  [DOC] Marshall Jewell (October 20, 1825February 10, 1883) was a manufacturer, pioneer telegrapher, telephone entrepreneur, world traveler, and political figure who served as 44th and 46th Governor of Connecticut, the U.S. Minister to Russia, the 25th United States Postmaster General, and Republican Party National Chairman. Jewell, distinguished for his fine "china" skin, grey eyes, and white eyebrows, was popularly known as the "Porcelain Man". As Postmaster General, Jewell made reforms and was intent on cleaning up the Postal Service from internal corruption and profiteering. Postmaster Jewell aided Secretary of the Treasury Benjamin H. Bristow shut down and prosecute the Whiskey Ring. President Grant, however, became suspicious of Jewell's loyalty after Jewell fired a Boston postmaster over non payment of a surety bond and asked for his resignation. [END]  
Answer: Republican Party
Republican Party