With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: John McCain made campaign finance reform one of his signature concerns.
text_B: John Sidney McCain III -LRB- born August 29 , 1936 -RRB- is an American politician who currently serves as the senior United States Senator from Arizona .. Arizona. Arizona. senior. Seniority in the United States Senate. United States Senator. United States Senator. He was the Republican nominee for the 2008 U.S. presidential election .. Republican. Republican Party ( United States ). nominee. presidential nominee. 2008 U.S. presidential election. United States presidential election, 2008. McCain followed his father and grandfather , both four-star admirals , into the United States Navy , graduating from the U.S. Naval Academy in 1958 .. his father. John S. McCain Jr.. grandfather. John S. McCain Sr.. four-star. four-star rank. admirals. Admiral ( United States ). United States Navy. United States Navy. U.S. Naval Academy. U.S. Naval Academy. He became a naval aviator , flying ground-attack aircraft from aircraft carriers .. naval aviator. naval aviator. ground-attack aircraft. ground-attack aircraft. aircraft carriers. aircraft carriers. During the Vietnam War , he was almost killed in the 1967 USS Forrestal fire .. Vietnam War. Vietnam War. Vietnam. Vietnam. In October 1967 , while on a bombing mission over Hanoi , he was shot down , seriously injured , and captured by the North Vietnamese .. Hanoi. Hanoi. He was a prisoner of war until 1973 .. prisoner of war. prisoner of war. McCain experienced episodes of torture , and refused an out-of-sequence early repatriation offer .. torture. torture. repatriation. repatriation. His war wounds have left him with lifelong physical limitations .. He retired from the Navy as a captain in 1981 and moved to Arizona , where he entered politics .. Arizona. Arizona. captain. Captain ( United States O-6 ). Elected to the U.S. House of Representatives in 1982 , McCain served two terms .. U.S. House of Representatives. U.S. House of Representatives. He was first elected to the U.S. Senate in 1986 , winning re-election easily five times , most recently in 2016 .. U.S. Senate. United States Senate. United States Senate election in Arizona, 1986. United States Senate election in Arizona, 2016. While generally adhering to conservative principles , McCain at times has had a media reputation as a `` maverick '' for his willingness to disagree with his party on certain issues .. conservative. Conservatism in the United States. After being investigated and largely exonerated in a political influence scandal of the 1980s as a member of the Keating Five , he made campaign finance reform one of his signature concerns , eventually gaining passage of the McCain -- Feingold Act in 2002 .. Keating Five. Keating Five. campaign finance reform. campaign finance reform. He is also known for his work in the 1990s to restore diplomatic relations with Vietnam , and for his belief that the Iraq War should have been fought to a successful conclusion .. Vietnam. Vietnam. Iraq War. Iraq War. McCain has chaired the Senate Commerce Committee , opposed spending that he considered to be pork barrel , and played a key role in alleviating a crisis over judicial nominations with the bi-partisan group known as the Gang of 14 .. Senate Commerce Committee. Senate Commerce Committee. pork barrel. pork barrel. Gang of 14. Gang of 14. McCain ran for the Republican nomination in 2000 but lost a heated primary season contest to George W. Bush of Texas .. Republican. Republican Party ( United States ). nomination in 2000. John McCain presidential campaign, 2000. a heated primary season contest. Republican Party presidential primaries, 2000. George W. Bush. George W. Bush. He secured the nomination in 2008 after coming back from early reversals , but was defeated by Democratic candidate Barack Obama in the general election , losing by a 365 -- 173 electoral college margin and by 53 -- 46 % in the popular vote .. nomination in 2008. John McCain presidential campaign, 2008. Democratic. Democratic Party ( United States ). Barack Obama. Barack Obama. the general election. United States presidential election, 2008. electoral college margin. Electoral College ( United States ). He subsequently adopted more orthodox conservative stances and attitudes and largely opposed actions of the Obama administration , especially in regard to foreign policy matters .. conservative. Conservatism in the United States. Obama administration. Presidency of Barack Obama. By 2013 , however , he had become a key figure in the Senate for negotiating deals on certain issues in an otherwise partisan environment .. In 2015 , McCain became chairman of the Senate Armed Services Committee .. Senate Armed Services Committee. United States Senate Committee on Armed Services
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