Question: The U.S. state of Arizona is the home of which Senator, an American politician and member of the Republican Party who since 2013 has served as the Junior United States Senator from Arizona, alongside former 2008 presidential nominee John McCain?

full_context: Document 1: John McCain presidential campaign, 2008: The 2008 presidential campaign of John McCain, the longtime senior U.S. Senator from Arizona, was launched with an informal announcement on February 28, 2007 during a live taping of the "Late Show with David Letterman", and formally launched at an event on April 25, 2007. His second candidacy for the Presidency of the United States, he had previously run for his party's nomination in the 2000 primaries and was considered as a potential running mate for his party's nominee, then-Governor George W. Bush of Texas. After winning a majority of delegates in the Republican primaries of 2008, on August 29, leading up to the convention, McCain selected Governor Sarah Palin of Alaska as his running mate for Vice President. Five days later, at the 2008 Republican National Convention, McCain was formally selected as the Republican Party presidential nominee in the 2008 presidential election.
Document 2: Jeff Flake: Jeffry Lane Flake (born December 31, 1962) is an American politician and member of the Republican Party who since 2013 has served as the Junior United States Senator from Arizona alongside former 2008 presidential nominee John McCain.
Document 3: Al Melvin (politician): Albert Anthony "Al" Melvin (born November 3, 1944) is a Republican politician who served in the Arizona Senate.
Document 4: McCain Institute: The McCain Institute for International Leadership is a Washington, D.C.-based think tank in cooperation with Arizona State University whose mission is to "advance leadership based on security, economic opportunity, freedom, and human dignity, in the United States and around the world." The institute was formed in 2012 and is named after U.S. Senator and 2008 Republican Party presidential nominee John McCain from Arizona. Based in Washington, D.C., the McCain Institute is part of Arizona State University. The current executive director of the McCain Institute is Kurt Volker.
Document 5: United States Senate election in Arizona, 1958: The 1958 United States Senate elections in Arizona took place on November 4, 1958. Incumbent Republican U.S. Senator Barry Goldwater ran for reelection to a second term, and defeated former U.S. Senator, and then-Governor, Ernest McFarland in the general election. The election was a virtual rematch from 1952, where Goldwater defeated McFarland by a narrow margin. Goldwater had attributed the win to the unpopularity of President Harry S. Truman and popular Wisconsin Senator Joseph McCarthy endorsing his campaign.
Document 6: Republican Party presidential primaries, 2008: The 2008 Republican presidential primaries were the selection process by which voters of the Republican Party chose its nominee for President of the United States in the 2008 U.S. presidential election. Senator John McCain of Arizona was selected as the nominee through a series of primary elections and caucuses culminating in the 2008 Republican National Convention held from Monday, September 1, through Thursday, September 4, 2008, in St. Paul, Minnesota.
Document 7: John McCain presidential campaign, 2000: The 2000 presidential campaign of John McCain, the United States Senator from Arizona, began in September 1999. He announced his run for the Republican Party nomination for the presidency of the United States in the 2000 presidential election.
Document 8: United States Senate election in Arizona, 2012: The 2012 United States Senate election in Arizona was held on November 6, 2012, alongside a presidential election, other elections to the United States Senate in other states, as well as elections to the United States House of Representatives and various state and local elections. Incumbent Republican U.S. Senator Jon Kyl, the Senate Minority Whip, decided to retire instead of running for re-election to a fourth term. Republican U.S. Representative Jeff Flake won the open seat.
Document 9: Political party strength in Arizona: The U.S. state of Arizona is the home of Senators Jeff Flake and John McCain, and the state is widely regarded as a Republican Party stronghold.
Document 10: United States Senate election in Arizona, 1980: The 1980 United States Senate election in Arizona took place on November 4, 1980. Incumbent Republican U.S. Senator Barry Goldwater decided to run for reelection to a third consecutive term, after returning to the U.S. Senate in 1968 following his failed Presidential run in 1964 against Lyndon B. Johnson. Goldwater defeated Democratic Party nominee Bill Schulz in the general election, but only by a narrow margin, which later caused Goldwater to decide against running for reelection to a fourth consecutive term.
Document 11: Cindy McCain: Cindy Lou Hensley McCain (born May 20, 1954) is an American businesswoman, philanthropist, and humanitarian, and the wife of long-time United States Senator and 2008 Republican presidential nominee John McCain of Arizona.
Document 12: United States presidential election, 2008: The United States presidential election of 2008 was the 56th quadrennial presidential election. It was held on Tuesday, November 4, 2008. Democratic Party nominees Barack Obama, a U.S. Senator from Illinois, and his running mate Joe Biden, a long-time U.S. Senator from Delaware, defeated Republican Party nominees John McCain, a long-time and current U.S. Senator from Arizona, and his running mate Sarah Palin, a Governor of Alaska. Obama became the first African American ever to be elected president of the United States, and Joe Biden became the first Roman Catholic ever elected vice president.
Document 13: United States Senate election in Arizona, 1962: The 1962 United States Senate election in Arizona took place on November 6, 1962. Incumbent Democratic U.S. Senator Carl Hayden ran for reelection to a seventh term, defeating Republican nominee State Senator Evan Mecham in the general election. Mecham became Governor of Arizona more than two decades later, and was subsequently impeached from office.
Document 14: Political positions of Rand Paul: Rand Paul is a member of the Republican Party, a U.S. Senator representing the state of Kentucky, and a former candidate for President of the United States. He received a score of 100% from the American Conservative Union in 2012, and his voting record was rated 26% liberal in 2011 by National Journal.
Document 15: Jan Brewer: Janice Kay Brewer (born September 26, 1944) is an American politician and author who served as the 22nd Governor of the U.S. state of Arizona, from 2009 to 2015. A member of the Republican Party, Brewer is the fourth woman, and third consecutive woman, to serve as Governor of Arizona. Brewer previously served as Secretary of State of Arizona from January 2003 to January 2009, when Governor Janet Napolitano resigned after being selected as Secretary of Homeland Security. Brewer became Governor of Arizona as part of the line of succession, as determined by the Arizona Constitution.
ground_truth: Jeffry Lane Flake