AUSTIN, Texas -- Texas Lt. Gov. David Dewhurst and tea-party backed former state Solicitor General Ted Cruz are heading to a runoff in the state's Republican primary for U.S. Senate.
The race to replace U.S. Sen. Kay Bailey Hutchison has been fierce, with brutal attacks from all sides. Candidates competed to see who could claim to be the true conservative in the race.
Dewhurst was short of the majority needed to earn the nomination outright. The two men will now face a runoff election on July 31 to advance to the November general election. A runoff also will decide the Democratic primary.
The other top candidates included former Dallas Mayor Tom Leppert and former ESPN football analyst Craig James.Below, a look back at Republicans who have suffered defeat in facing off against Tea Party-backed candidates.
Tea Party insurgent Christine O'Donnell <a href="http://www.huffingtonpost.com/2010/09/14/delaware-election-results_n_715598.html" target="_hplink">defeated</a> GOP establishment candidate Mike Castle in Delaware's Republican Senate primary in 2010. O'Donnell <a href="http://www.huffingtonpost.com/2010/11/02/chris-coons-defeats-chris_n_765874.html" target="_hplink">lost</a> in the state's general election contest to Democratic Sen. Chris Coons.
After serving six terms in the Senate, Indiana Republican Richard Lugar <a href="http://www.huffingtonpost.com/2012/05/08/dick-lugar-richard-mourdock-lugar-loses-indiana-republican-senate-primary_n_1501416.html" target="_hplink">was defeated</a> by Tea Party-backed Richard Mourdock in a primary contest in the 2012 election season.
Former Sen. Bob Bennett was <a href="http://www.huffingtonpost.com/2010/05/08/bob-bennett-utah-gop-senate_n_568988.html" target="_hplink">ousted from his post</a> at the 2010 Utah GOP Convention. Tea Party-backed Sen. Mike Lee currently holds Bennett's old seat.
Before winning another term in the 2010 midterm election, Sen. Lisa Murkowski was defeated by Tea Party-backed <a href="http://www.huffingtonpost.com/2010/08/26/joe-miller-alaska-candida_n_694559.html" target="_hplink">Joe Miller</a> in Alaska's race for the Republican Senate nomination. Murkowski mounted a successful <a href="http://www.huffingtonpost.com/2010/11/12/alaska-senate-race-write-in-ballots_n_782724.html" target="_hplink">write-in campaign</a> to keep her seat.
Tea Party-backed Sharron Angle <a href="http://www.huffingtonpost.com/2010/06/09/sharron-angle-wins-nevada_n_605366.html" target="_hplink">crushed</a> GOP establishment pick Sue Lowden's political ambitions in Nevada's GOP Senate primary in 2010. Angle <a href="http://www.huffingtonpost.com/2010/11/03/harry-reid-sharron-angle_n_765995.html" target="_hplink">proved unsuccessful</a> in her bid to unseat Senate Majority Leader Harry Reid in the general election.
GOP establishment candidate Jane Norton was defeated by Tea Party-backed Ken Buck in Colorado's 2010 Senate GOP primary. Buck ultimately <a href="http://www.huffingtonpost.com/2010/11/03/colorado-election-results_1_n_765865.html" target="_hplink">proved unsuccessful</a> in his bid to unseat Democratic Sen. Michael Bennet.
Former Florida Gov. Charlie Crist, who ran for Senate as an independent after beginning his campaign as a Republican in 2010, ultimately fell short in his political operation. Tea Party-backed Marco Rubio <a href="http://www.huffingtonpost.com/2010/11/02/marco-rubio-defeats-charlie-crist-kendrick-meek_n_765882.html" target="_hplink">defeated</a> Christ and Democrat Kendrick Meek in Florida's Senate general election match-up.