Information: - A U.S. state is a constituent political entity of the United States of America. There are 50 states, which are bound together in a union with each other. Each state holds administrative jurisdiction over a defined geographic territory, and shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody). - A federal republic is a federation of states with a republican form of government. At its core, the literal meaning of the word republic when used to reference a form of government means: "a country that is governed by elected representatives and by an elected leader (such as a president) rather than by a king or queen". - A primary election is an election that narrows the field of candidates before a general election for office. Primary elections are one means by which a political party or a political alliance nominates candidates for an upcoming general election or by-election. - Terry Edward Branstad (born November 17, 1946) is an American politician who is the 42nd Governor of Iowa, in office since January 2011. Branstad was also the state's 39th governor from 1983 to 1999, and he was president of Des Moines University from 2003 to 2009. He is a member of the Republican Party. Branstad is the longest-serving governor in American history. In his 2010 political comeback, Branstad won a three-way primary election for the Republican nomination to run for governor in the general election. He faced incumbent Governor Chet Culver, a Democrat and four third party candidates on November 2, 2010, defeating Culver by 52.9% to 43.1%. - David A. Vaudt is the former Auditor of State of the U.S. state of Iowa . A Republican , he was first elected to the office in November 2002 and took office in January 2003 . He was re-elected in November 2006 and 2010 . Vaudt announced his resignation as state Auditor in April 2013 after being named the next chairman of the Governmental Accounting Standards Board ( GASB ) , which he will take office as July 1 . Gov. Terry Branstad appointed Mary Mosiman , a former county auditor who was serving as the Deputy Secretary of State , as the new State Auditor . Mosiman started in the office on May 13 , 2013 . Given the information above, choose from the list below the object entity that exhibits the relation 'member of political party' with the subject 'david a. vaudt'. Choices: - alliance - republic - republican party - union
A:
republican party