It continues at the Bee County Courthouse through Friday.
The primary runoff election is scheduled for July 31.
Anyone who voted in either primary must vote in the same party’s runoff election — those voters cannot switch.
Also, if an eligible voter did not cast a ballot during the primary, he or she may still vote in either party’s primary runoff.
On the Republican ticket, neither David Dewhurst nor Ted Cruz received 50 percent of the total vote — which forces a runoff in the race for U.S. senator.
On the Democratic ticket, Paul Sadler will face Grady Yarbrough.
State representative of District 43
The Republican nomination for state representative of District 43 will pit incumbent J.M. Lozano against Bill T. Wilson II.
U.S. representative of District 34
In the race for Republican nomination for U.S. representative of District 34, Adela Garza will face Jessica Puente Bradshaw.
On the Democratic ticket, Filemon Vela will face Denise Saenz-Blanchard.
In the race for railroad commissioner, Republican Christi Craddick will square off against Warren Chisum.
The winner here will face Dale Henry in the November general election.
Likewise, the Republican race for railroad commissioner, filling an unexpired term, will pit Barry Smitherman against Greg Parker.
The winner will not have a Democratic opponent in the November election.
Justice, Supreme Court, Place 4
For the Republican nomination of justice, Supreme Court, Place 4, David Medina will face John Devine.