Question: What function does the non-voting Delegate to the United States House of Representatives representing the District of Columbia serve?

Context articles: United States elections, 2016
Eleanor Holmes Norton
Donna Christian-Christensen
Guam's at-large congressional district
District of Columbia Delegate Act
United States congressional delegations from Utah
List of United States congressional districts
Guamanian general election, 2008
Guamanian general election, 2010
Robert White (Washington, D.C. politician)

The 2016 United States elections were held on Tuesday, November 8, 2016.
 During this presidential election year, the President of the United States and Vice President were elected.
 In addition, elections were held for all 435 voting-member seats in the United States House of Representatives (as well as all six non-voting delegate seats) and 34 of the 100 seats in the United States Senate to determine the 115th Congress.
Eleanor Holmes Norton (born June 13, 1937) is a non-voting Delegate to the United States House of Representatives representing the District of Columbia.
 As a non-voting member, Norton may serve on committees as well as speak on the House floor; however, she is not permitted to vote on the final passage of any legislation.
Donna Marie Christian-Christensen, formerly Donna Christian-Green (born September 19, 1945), is an American physician and politician.
 She served as the non-voting Delegate from the United States Virgin Islands to the United States House of Representatives (map) from 1997 until 2015.
Guam's at-large congressional district comprises the entire area of the United States territory of Guam.
 Guam has been represented in the United States House of Representatives by a non-voting delegate since 1972.
 It is currently represented by Democrat Madeleine Bordallo who has represented the district since 2003.
The District of Columbia Delegate Act Pub.L.
 91–405 , 84 Stat.
 845-2 of 1970 authorized voters in the District of Columbia to elect one non-voting delegate to represent them in the United States House of Representatives.
 The act was approved by the Congress on September 22, 1970 and subsequently signed into law by President Richard Nixon.
 On March 23, 1971, Democrat Walter E. Fauntroy was elected as the district's delegate to Congress, receiving 58 percent of the 116,635 votes cast.
Since Utah became a U.S. state in 1896, it has sent congressional delegations to the United States Senate and United States House of Representatives.
 Each state elects two senators to serve for six years.
 Before the Seventeenth Amendment in 1913, senators were elected by the Utah State Legislature.
 Members of the House of Representatives are elected to two-year terms, one from each of Utah's four congressional districts.
 Before becoming a state, the Territory of Utah elected a non-voting delegate at-large to Congress from 1850 to 1896.
There are 435 state congressional districts in the United States House of Representatives, with each one representing approximately 711,000 people.
 The total number of state members has been capped by the "Reapportionment Act of 1929".
 In addition, each of the five inhabited U.S. territories and the federal district of Washington, D.C. sends a non-voting delegate to the House of Representatives.
General elections were held in Guam on 4 November 2008.
 Voters in Guam chose their non-voting delegate to the United States House of Representatives, as well as members of the territorial legislature.
 The election coincided with the 2008 United States elections.
General elections were held in Guam on November 2, 2010.
 Voters in Guam chose their Governor, their non-voting delegate to the United States House of Representatives, Attorney General, as well as all fifteen members of the territorial legislature.
The election coincided with the 2010 United States elections.
Robert White, Jr. (born 1982) is an attorney and politician from Washington, D.C., in the United States.
 From 2008 to 2014, he was legislative counsel in the office of Eleanor Holmes Norton, the District of Columbia's Delegate to the United States House of Representatives.
 In 2014, he was an unsuccessful candidate for an at-large seat on the Council of the District of Columbia, placing fourth.
 He won the Democratic primary for the at-large seat in 2016, defeating 12-year incumbent Vincent Orange.
 After Orange resigned his seat, White was appointed as Orange's interim successor, and sworn in on September 16, 2016.
 He won election to his seat in November 2016.