In the 2010 election, Lamar Smith defeated Lainey Melnick with 68.9 percent of the vote. Melnick, an Austin real estate broker, officially filed papers with the Federal Election Commission on June 23, 2009 to become a candidate.
Incumbent Lamar Smith faced five challengers in the 2012 general election on November 6, 2012: Candace Duval (Dem), John-Henry Liberty (Lib), Fidel Castillo (Grn), Bill Stout (Grn), and Carlos Pena (Ind).
Lamar Smith did not run for reelection in 2018.
On the Republican side of the ticket, Attorney Chip Roy (R) served as chief of staff to Sen. Ted Cruz (R-Tex.) and senior advisor to Texas Gov. Rick Perry (R)..
On the Democratic side, four candidates ran to replace him: Joseph Kopser, entrepreneur and Army veteran; Derrick Crowe, activist; Elliott McFadden, Executive Director of Austin B-cycle; and Mary Wilson, pastor. The primary election took place on March 6, 2018.  After a runoff against Mary Street Wilson, Joseph Kopser won the May 22, 2018 Democratic primary with 58% of the vote.