Republican U.S. Senate candidates Ted Cruz, left, and Lt. Gov. David Dewhurst face off in a primary runoff on Tuesday.
Texas voters will head to the polls Tuesday to settle the score in 37 races left undecided in the May primaries.
All eyes will be on Lt. Gov. David Dewhurst and former Texas Solicitor General Ted Cruz as they battle it out for the GOP nod to replace retiring U.S. Sen. Kay Bailey Hutchison.
Dewhurst had all the name recognition and money coming into the race, as well as the backing of Governor Rick Perry as well as other prominent Texas Republicans.
Cruz was a virtual unknown with very little campaign cash. A delayed primary date allowed Cruz to build name recognition.
In recent weeks the two have spent millions of dollars in advertising time, billboards, signs and other materials during the final push toward the end of what has been a largely negative campaign.
The latest polls show Cruz with a lead over Dewhurst.
Cruz, enjoying the support of many Tea Party groups, is looking to pull a huge upset that could send a message to Texas GOP establishment that backs Dewhurst.
Both candidates will be at voting locations Tuesday morning in Houston pushing for votes.
On the Democratic side of the ballot, former TX Representative Paul Sadler and Grady Yarbrough, who is running a mostly self-funded campaign.
The polls open at 7 a.m. Tuesday and will close by 7 p.m.
Here are the other significant races being decided Tuesday:
Railroad Commission Place 1: Warren Chisum vs Christi Craddick
Supreme Court Place 4: John Devine vs David Medina
State Board of Education District 10: Tom Maynard vs Rebecca Osborne
State Board of Education District 12: Miller vs Spurlock
Congressional District 14: Felicia Harris vs Randy Weber
Congressional District 25: Wes Riddle vs Roger Williams
Congressional District 36: Steve Stockman vs Stephen Takach
Senate District 25: Jeff Wentworth vs Donna Campbell
House District 11: Travis Clardy vs Chuck Hopson
House District 43: J.M. Lozano vs Bill Wilson
House District 59: Sid Miller vs J.D. Sheffield
State Board of Education District 2: Ruben Cortez vs Celeste Zepeda Sanchez
Congressional District 23: Pete Gallego vs. Ciro Rodriguez
Congressional District 33: Domingo Garcia vs Marc Veasey
Congressional District 34: Filemon Vela vs Denise Saenz Blanchard