Question: What caucus is the current Representative from Texas's 6th congressional district a member of?

Context paragraphs:
Dick Muri: Richard Walter "Dick" Muri (born November 30, 1953) is an American politician of the Republican Party.  He is a member of the Washington House of Representatives, representing the 28th legislative district.  Muri was appointed to the Washington State House of Representatives following (now former) State Representative Steve O'Ban's appointment to the Washington State Senate after State Senator Mike Carrell's death.  From 2003 to 2012, he served as a Republican member of the Pierce County Council, representing the 6th District.  In 2010, he ran as a Republican candidate for U.S. Congress in Washington's 9th congressional district against incumbent Democratic Congressman Adam Smith, eventually losing to Smith by nearly 10 points.  In 2012, he again ran, this time in Washington's 10th congressional district against Denny Heck, losing by 17 points.

Barbara Lee: Barbara Jean Lee (born July 16, 1946) is the U.S. Representative for California 's 13th congressional district , serving East Bay voters from 1998 to 2013 during a time when the region was designated California 's 9 congressional district .  She is a member of the Democratic Party.  She was the first woman to represent the 9th district and is also the first woman to represent the 13th district.  Lee was the Chair of the Congressional Black Caucus and was the Co-Chair of the Congressional Progressive Caucus.  Lee is notable as the only member of either house of Congress to vote against the authorization of use of force following the September 11, 2001 attacks.  This made her a hero among many in the anti-war movement.  Lee has been a vocal critic of the war in Iraq and supports legislation creating a Department of Peace.

George H. Christopher: George Henry Christopher (December 9, 1888 – January 23, 1959) was a Democratic Party representative from Missouri's 6th congressional district from January 3, 1949 to January 3, 1951 and from the Missouri's 4th congressional district from January 3, 1955 until his death January 23, 1959.

Frederick R. Lehlbach: Frederick Reimold Lehlbach (January 31, 1876 – August 4, 1937) was an American lawyer and politician.  As a Republican, Lehlbach served as the U.S. Representative for New Jersey's 10th congressional district from 1915 to 1933 and as the representative from New Jersey's 12th congressional district from 1933 to 1937.  Lehlbach was also the nephew of Herman Lehlbach, a former U.S. Representative from New Jersey's 6th congressional district who served from 1885 to 1891.

Karen Handel: Karen Christine Handel (née Walker; born April 18, 1962) is an American businesswoman, politician, and member of the United States House of Representatives for Georgia's 6th congressional district.  In 2017, she became the first Republican woman to be elected to the U.S. Congress from Georgia after defeating Democratic candidate Jon Ossoff on June 20 in the 2017 special election to fill the vacancy in Georgia's 6th congressional district in the most expensive congressional race in American history.

Texas's 6th congressional district: Texas District 6 of the United States House of Representatives is a Congressional district that serves an area including four counties to the south of the Dallas/Fort Worth area plus the southeast corner of Tarrant County.  As of the 2000 census, District 6 represents 651,620 people.  The current Representative from District 6 is Joe Barton and has been since 1985.

John Spratt: John McKee Spratt Jr. (born November 1, 1942) is an American politician who was the U.S. Representative for South Carolina 's 5 congressional district from 1983 to 2011.  He is a member of the Democratic Party.  Spratt was the dean of the South Carolina congressional delegation, chairman of the U.S. House Committee on the Budget, and the second ranking Democrat on the U.S. House Committee on Armed Services, where he served on three subcommittees: Oversight and Investigations, Strategic Forces, and Air and Land Forces.  In addition to his committee work, he co-chaired the Textile Caucus, the Bearing Caucus, and the Nuclear Energy Caucus.  The 5th Congressional District covers all or part of 14 counties in north-central South Carolina.  The largest cities are Rock Hill and Sumter.  On November 2, 2010, he lost to Republican challenger Mick Mulvaney.

Rick Nolan: Richard Michael Nolan (born December 17, 1943) is an American politician and member of the Minnesota Democratic–Farmer–Labor Party who has been the U.S. Representative for Minnesota's 8th congressional district since 2013 and previously served as the U.S. Representative for Minnesota's 6th congressional district from 1975 to 1981.

Joe Barton: Joe Linus Barton (born September 15, 1949) is a Republican politician, representing  's 6 congressional district () in the U.S. House of Representatives since 1985, and a member of the Tea Party Caucus.  The district includes Arlington, part of Fort Worth, and several small towns and rural areas south of the Dallas–Fort Worth Metroplex.  Following the 2014 primary defeat of Ralph Hall, Barton became the dean of the Texas congressional delegation.  Barton came to national prominence after telling a citizen at a town hall meeting to "shut up", although the citizen later claimed he deserved it.

Texas' 19th congressional district: Texas' Nineteenth Congressional District of the United States House of Representatives is a Congressional district that serves the upper midwestern portion of the state of Texas The district includes portions of the State from Lubbock to Abilene.  The current Representative from the 19th District is Republican Jodey Arrington.

Supporting paragraphs: Texas's 6th congressional district Joe Barton
Answer: Tea Party Caucus