This Presidential Primary coincides with a state/local primary. These coinciding primaries tend to have an impact upon voter turnout.

Voter registration ends 30 days before the Primary and voters affiliate with the Republican Party by either voting in the Republican Primary or signing an affidavit of affiliation. There is no party registration in Texas.

Tuesday 5 March 2024: Texas Primary. Hours reportedly 7:00a-7:00p CST (1300-0100 UTC) / 7:00a-7:00p MST (1400-0200 UTC). Only the area around El Paso is in MST, so the vast majority of polls have closed in TX by 7 PM CST. Delegate Selection: Winner-Take-Most Primary. Voter Eligibility: Open Primary. Write-in candidates are not allowed. "Uncommitted" appears on the ballot. [General Rules for All Conventions and Meetings. Rule 38. Section 3.]

Primary
Source: Texas Elections Division.
Status: Official. Retrieved: Thursday 13 June 2024.
Included in Nationwide vote.

Delegates to the Republican National Convention are bound to presidential contenders in today's Texas Presidential Primary [General Rules for All Conventions and Meetings. RPT Rule 38.].

• 114 district delegates are to be allocated to presidential contenders based on the primary results in each of the 38 congressional districts: each congressional district is assigned 3 National Convention delegates. These delegates are allocated to the presidential contenders as follows:
• If a candidate receives a majority of the vote (more than 50%), that candidate is allocated all 3 of the district's delegates. [General Rules for All Conventions and Meetings. Rule 38. Section 8.a. and 8.b.]
• If no candidate receives a majority of the vote and at least 1 candidate receives 20% or more of the vote, the candidate with the most votes (plurality) receives 2 delegates and the candidate receiving the next highest number of votes receives 1 delegate. [Rule 38. Section 8.b.]
• If no candidate receives 20% of the vote then the top 3 vote getters each receive 1 delegate. [Rule 38. Section 8.c.]
• At-Large Delegates and Alternates Allocated by Presidential Primary:
• If a candidate receives a majority of the vote (more than 50%) that candidate is allocated all 47 at-large delegates. [Rule 38. Section 9.b.1.]
• If no candidate receives a majority of the vote and at least 2 candidates receive 20% or more of the vote, the 47 at-large delegates are allocated proportionally among those candidates receiving 20% or more of the vote. Rounding rules: Beginning with the candidate receiving the largest number of votes, round any fraction to the next whole number of delegates. Continue this process with the next highest vote getter and repeat until all the delegates are allocated. [Rule 38. Section 9.b.2.]
• If no candidate receives a majority of the vote and only 1 candidate receives 20% or more of the vote, the 47 at-large delegates are allocated proportionally between the candidate receiving 20% or more of the vote and the candidate receiving the next highest number of votes. Rounding rules: Beginning with the candidate receiving the largest number of votes, round any fraction to the next whole number of delegates. Continue this process with the next highest vote getter and repeat until all the delegates are allocated. [Rule 38. Section 9.b.3]
• If no candidate receives 20% of the vote, allocate the 47 at-large delegates proportionally. Rounding rules: Beginning with the candidate receiving the largest number of votes, round any fraction to the next whole number of delegates. Continue this process with the next highest vote getter and repeat until all the delegates are allocated. [Rule 38. Section 9.b.3]

Primary
Source: Texas Elections Division.
Status: Official. Retrieved: Thursday 13 June 2024.

Statewide: winner-take-all for Trump.

RPT Rule 38, Section 9(a) says to allocate 25% of the total National delegates delegates by a vote at the State Convention. That would be 161 × 0.25 = 40.25 => 40 rounded down (121 are allocated by the primary). It is probably interpreted as 25% of the at-large delegates which would be 47 × 0.25 = 11.75 => 11 rounded down (36 are allocated by the primary).

A Presidential candidate may withdraw from participation in the Presidential Primary ... by filing with the Secretary of the SREC a signed and acknowledged request ... votes cast for that candidate shall be deemed votes for uncommitted. If a candidate dies ... votes cast for that candidate shall be counted [as] uncommitted. [Rule 38. Section 2.d and 2.e]

Once the polls are closed, Precinct Conventions may be convened. While most Precinct Conventions occur on primary election day, they can occur at different dates including the Saturday following the primary, the Friday evening prior to or, the morning of the County and Senatorial District Conventions. The Precinct Conventions elect delegates to the County and Senatorial District Conventions.

Sunday 24 March 2024: County and Senatorial District Conventions. Delegates are elected to the State Convention. [Rule 27A]

Thursday 23 May - Saturday 25 May 2024: The Texas Republican State Convention convenes in San Antonio. The National Convention delegates are elected on the according to the results of the primary and State Convention on the last day of the convention. [General Rules for All Conventions and Meetings. Rule 38.]

• 114 district delegates are elected: 3 from each of the state's 36 congressional districts.
• 44 at-large delegates (10 base at-large delegates plus 34 bonus delegates) are elected.
• The 3 party leaders, the National Committeeman, the National Committeewoman, and the chairman of the Texas's Republican Party, will attend the convention as pledged delegates by virtue of their position.

National Convention delegates are:

• bound for the 1st ballot unless "released from the pledge only in the event of death, withdrawal, or by decision of the candidate". [Section 10.b.1]
• bound for the 2nd ballot unless "released from the pledge if the candidate has failed to receive 20% or more of the total vote ... or by decision of the candidate.". [Section 10.b.2.]
• released for the 3rd and subsequent ballots. [Section 10.b.3]

RPT Rule 8 section 9(a) says "The delegates elected to the State Convention shall caucus by secret ballot and select a presidential candidate by plurality vote to receive the entitlement of a number of at-large delegates that will represent 25% (rounded down) of the total number of delegates ... to the Republican National Convention." We are unsure if this means:

• 25% of 162 (actual TOTAL number of Texas delegates) = 40.5 => 40 delegates allocated by state convention vote, leaving 8 at-large delegates to be allocated by the primary vote.
• 25% of 45 (10 base at-large delegates plus 34 bonus delegates) = 11.25 => 11 delegates allocated by state convention vote, leaving 37 (or 34 if the 3 RNC delegates are not included) at-large delegates to be allocated by the primary vote.
• 25% of 48 (10 base at-large delegates plus 34 bonus delegates plus 3 RNC delegates) = 12 delegates allocated by state convention vote, leaving 36 at-large delegates to be allocated by the primary vote.
• "... select a presidential candidate by plurality vote to receive the entitlement of a number of at-large delegates that will represent 25% ...." [RPT Rule 38, Section 9.c.]. We are interpreting this clause to mean the candidate receiving the most votes at the convention receives all the 25%.

Hence, delegates are allocated by Presidential Preference using (1) primary vote of 5 March and (2) the state Convention vote of 24-25 May.

RPT Rule 38, Section 9.c. has an escape clause to revert to using the primary vote for the at-large delegates in the event the RNC rejects the use of the state Convention vote. RNC Rule 16(a)(1) implies that the state only gets 1 chance to express presidential preference.

• Pursuant to The Rules of the Republican Party Rule No. 17, either the chairman of the Republican National Committee or the Republican National Committee Standing Committee on Rules, determines that the caucus vote is in violation of The Rules of the Republican Party, all At-Large Delegates will be allocated in using the results of the primary. [RPT Rule 38, Section 9.c.]
• "Any statewide presidential preference vote that permits a choice among candidates ... must be used to allocate and bind the state’s delegation to the national convention." [RNC Rule 16(a)(1)]

At-Large Delegates Allocated by State Convention Caucus on 24-25 May: The State Convention delegates vote by secret ballot to select a presidential candidate by plurality vote to be allocated 40 at-large National Convention delegates. [Rule 38, Section 9.a.]