2002
In the 2002 Republican primary, Cornyn faced five opponents.
Cornyn defeated his closest Republican challenger, self-financed Dallas-based international physician Bruce Rusty Lang, in the election by a ten-to-one margin.
In the general election, Cornyn defeated Democratic nominee Ron Kirk in a campaign that cost each candidate over $9 million.

2008
Texas has not elected a Democrat in a statewide election since 1994, and according to Rasmussen Reports polling, in October 2008 Cornyn had an approval rating of 50%.
Christian activist Larry Kilgore of Mansfield challenged Cornyn in the Republican primary, but Cornyn easily defeated him.
Texas Representative Rick Noriega won the March 4 Democratic primary against Gene Kelly, Ray McMurrey, and Rhett Smith.
Yvonne Adams Schick was the Libertarian Party's nominee, and the Green Party of Texas sought ballot access for its candidate, David B. Collins.
The same Rasmussen poll showed Cornyn leading Noriega 47% to 43%, suggesting that the race might prove unexpectedly competitive, but most polls showed a much wider margin, and Cornyn was reelected.

2014
Cornyn was reelected in 2014, and according to the Dallas Morning News, "never broke a sweat."
He won the March Republican primary with 59% of the vote against Houston-area congressman Steve Stockman.
In the general election, he raised $14 million, outspending Democratic nominee David Alameel by nearly 3-1.
2002
In the 2002 Republican primary, Cornyn faced five opponents. Cornyn defeated his closest Republican challenger, self-financed Dallas-based international physician Bruce Rusty Lang, in the election by a ten-to-one margin. In the general election, Cornyn defeated Democratic nominee Ron Kirk in a campaign that cost each candidate over $9 million.
2008
Texas has not elected a Democrat in a statewide election since 1994, and according to Rasmussen Reports polling, in October 2008 Cornyn had an approval rating of 50%. Christian activist Larry Kilgore of Mansfield challenged Cornyn in the Republican primary, but Cornyn easily defeated him. Texas Representative Rick Noriega won the March 4 Democratic primary against Gene Kelly, Ray McMurrey, and Rhett Smith. Yvonne Adams Schick was the Libertarian Party's nominee, and the Green Party of Texas sought ballot access for its candidate, David B. Collins. The same Rasmussen poll showed Cornyn leading Noriega 47% to 43%, suggesting that the race might prove unexpectedly competitive, but most polls showed a much wider margin, and Cornyn was reelected.
2014
Cornyn was reelected in 2014, and according to the Dallas Morning News, "never broke a sweat." He won the March Republican primary with 59% of the vote against Houston-area congressman Steve Stockman. In the general election, he raised $14 million, outspending Democratic nominee David Alameel by nearly 3-1.
John Cornyn