Participation in Missouri's delegate selection process is open to all voters who are current members of the Missouri Democratic Party.

Tuesday 7 February 2012: 89 of 102 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's Missouri Presidential Primary. A mandatory 15 percent threshold is required in order for a presidential contender to be allocated National Convention delegates at either the congressional district or statewide level.

• 58 district delegates are to be allocated proportionally to presidential contenders based on the primary results in each of the State's 9 congressional districts. (numbers as of 3 February 2012)
• CD 1: 9
• CD 2: 6
• CD 3: 8
• CD 4: 5
• CD 5: 8
• CD 6: 6
• CD 7: 5
• CD 8: 5
• CD 9: 6
• In addition, 31 delegates are to be allocated to presidential contenders based on the primary vote statewide.
  • 19 at-large National Convention delegates
  • 12 Pledged PLEOs

7 February 2012: The Secretary of State did not provide a breakdown of the vote by Congressional District. We assume that President Obama is the only candidate to receive 15% in any CD thus receiving all of the state's pledged delegates.

Here's how we compute the delegate count:

1. A candidate must receive 15% or more of the total popular vote to qualify for delegates. Discard votes cast for those candidates who do not meet the threshold.
2. Allocate Congressional District delegates from the qualified vote in each district. Allocate Pledged PLEO and At-Large delegates using the state-wide qualified vote.
3. In each jurisdiction (CD and statewide):
1. Total qualified vote = total votes cast for the qualifying candidates in the jurisdiction.
2. Allocation = (delegates for the jurisdiction) × (candidate's popular vote) ÷ (total qualified vote).
3. Assign each candidate the WHOLE NUMBER of delegates.
4. If delegates remain, allocate each of the remaining delegates to those candidates with the LARGEST REMAINDERS.

Thursday 29 March 2012: Mass Meetings. These meetings elect delegates to the Congressional District and State Conventions.

Thursday 26 April 2012: Congressional District Conventions.

National Convention District Delegates are elected according to the results of the Primary.

Saturday 5 May 2012: The Democratic State Committee meets in Jefferson City.

National Convention Pledged PLEO Delegates are elected according to the results of the Primary.

Saturday 9 June 2012: State Convention in Columbia.

National Convention At-Large Delegates are elected according to the results of the Primary.

The remaining 13 National Convention delegates consist of

• 13 Unpledged PLEO delegates:
• 7 Democratic National Committee members.
• 4 Members of Congress (1 Senator and 3 Representatives).
• 1 Governor.
• 1 Distinguished Party Leader (former U.S. House Majority Leader Richard Andrew "Dick" Gephardt).

These 13 delegates and will go to the Democratic National Convention officially "Unpledged".

Notes:

On 6 January 2011, Representative Tony Dugger (Republican) introduced HB 121. This bill would move the Presidential primary from the 1st Tuesday after the 1st Monday in February to the 1st Tuesday after the 1st Monday in March.

HB 503 was introduced on 14 February 2011 and is sponsored by by Representative Tony Dugger (Republican). The bill would move the state's Presidential Primary from the first Tuesday after the first Monday in February to "the first Tuesday after the first Monday in March".

16 February 2011: State senator Kevin Engler (Republican) introduced the companion to HB 503: SB 282. Both bills move the Presidential Primary to "the first Tuesday after the first Monday in March". On 16 March 2011, SB 282 was perfected to move the Presidential Primary to "seven days after the presidential primary is conducted in the state of New Hampshire". As of the 4 May 2011 Third Read: a presidential primary ... shall be held on the first Tuesday after the first Monday in March. This bill was vetoed by Governor Jay Nixon (Democratic) on 8 July 2011.

On 28 February 2011, Representative Jay Barnes (Republican) introduced HB 694. This bill would move the Presidential Primary (1st Tuesday in February) and the partisan primary (first Tuesday after the 1st Monday in August) to the 2nd Tuesday after the 1st Monday in June.

On 22 July 2011, Governor Jay Nixon (Democratic) announced that he will ask the General Assembly to pass a bill to move the Presidential Primary from the 1st Tuesday after the first Monday in February to the 1st Tuesday after the 1st Monday in March.

On 6 September 2011, state Representative Tony Dugger (Republican) introduced HB 3 at the 96th General Assembly, 1st Extraordinary Session. The bill would move the state's Presidential Primary from the 1st Tuesday after the 1st Monday in February to the 1st Tuesday after the 1st Monday in March.

On 29 September 2011, the law to move the Presidential Primary 7 February to 6 March 2012 was vetoed by Governor Jeremiah W. "Jay" Nixon and appears to be dead.

11 October 2011 by the Associated Press: Missouri to consider abolishing presidential primary.

The Missouri Legislature adjourned 24 October 2011 without canceling the 7 February 2012 Presidential Primary.

On 5 January 2012, HB 1183 was introduced. The bill would cancel the 2012 presidential primary.