Texas Secretary of State Early Voting Information. http://www.sos.state.tx.us/elections/earlyvoting/index.shtml. Accessed: February 22, 2018. Counties included: Harris, Dallas, Tarrant, Bexar, Travis, Collin, El Paso, Denton, Fort Bend, Hidalgo, Montgomery, Williamson, Galveston, Nueces, Brazoria.

*This data only includes announced retirements. At the time of publication, no primary or general election contests have taken place.

Data contained herein was compiled from Ballotpedia, "United States Congressional Delegations from Texas,"  https://ballotpedia.org/United_States_congressional_delegations_from_Texas and from Wikipedia, "United States congressional delegations from Texas," https://en.wikipedia.org/wiki/United_States_congressional_delegations_from_Texas accessed November 12 and 13, 2017.

Costello, TJ; Green, David; Graves, Patrick. 2016. "The Texas Economic Stabilization Fund: Saving for Rainy Days." Fiscal Notes, September 2016. https://comptroller.texas.gov/economy/fiscal-notes/2016/september/rainy-day.php Accessed, March 29, 2017.

Turnout is typically calculated as the number of votes cast divided by the voting-age population (VAP) which is estimated by the Census Bureau as the number of residents in a jurisdiction eighteen years and older. Note that VAP is an estimate since it includes persons ineligible to vote, mainly non-citizens and ineligible felons, and excludes overseas eligible voters. Primary election turnout estimates here combine in the numerator votes cast in both the Democratic and Republican primaries. National Turnout as a percentage of VAP is from the Federal Election Commission at http://www.fec.gov, accessed 1 July 2004. Texas turnout figures are from the Texas Secretary of State athttp://www.sos.state.tx.us/elections/historical/70-92.shtml, accessed 2 January 2013.

For the 2004, 2008 and 2012 presidential elections, national turnout as a percentage of VAP comes from the United States Elections Project, George Mason University, http://elections.gmu.edu, January 2, 2013.