Tuesday 6 March 2012: 174 of 191 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's Ohio Presidential Primary. A mandatory 15 percent threshold is required in order for a presidential contender to be pledged National Convention delegates at either the congressional district or statewide level.

• 113 district delegates are to be pledged proportionally to presidential contenders based on the primary results in each of the State's 18 congressional districts (apportioned per the 2000 redistricting).
• CD 1: 6
• CD 2: 4
• CD 3: 4
• CD 4: 4
• CD 5: 4
• CD 6: 6
• CD 7: 4
• CD 8: 4
• CD 9: 11
• CD 10: 9
• CD 11: 13
• CD 12: 6
• CD 13: 9
• CD 14: 4
• CD 15: 6
• CD 16: 4
• CD 17: 11
• CD 18: 4
• In addition, 61 delegates are to be pledged to presidential contenders based on the primary vote statewide.
  • 38 at-large National Convention delegates
  • 23 Pledged PLEOs

District-level delegates are slated to each Presidential Preference in pre-primary caucuses held in each Congressional District on 5 January 2012.

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.

President Obama, the only candidate appearing on the ballot, will receive all of Ohio's pledged delegates.

Thursday 12 April 2012: Post Primary Caucus. Delegates are elected according to the results of the primary. There is one caucus location per congressional district.

If a presidential candidate has qualified to receive delegates but has failed to slate a sufficient number of delegates, then additional delegates for that candidate will be selected during the post-primary caucus.

Saturday 28 April 2012: State Executive Committee

National Convention Pledged PLEO and At-Large Delegates are selected by the State Democratic Executive Committee according to the results of the primary.

The remaining 17 National Convention delegates consist of

• 17 Unpledged PLEO delegates:
• 10 Democratic National Committee members.
• 6 Members of Congress (1 Senator and 5 Representatives).
• 0 Governors.
• 1 Distinguished Party Leader (former DNC Chairman David Wilhelm)

These 17 delegates and will go to the Democratic National Convention officially "Unpledged".

Notes:

Starting on Tuesday 20 March 2012, a 15% pledged delegate bonus is awarded when clusters of 3 or more neighboring states (Indiana, Ohio, West Virginia) begin on the same date (8 May 2012).

The state should receive a 20% pledged delegate bonus for starting in Stage III (May and June).

HB 194, introduced on 18 May 2011 by Representatives Robert P. Mecklenborg (Republican) and Louis W. Blessing, Jr. (Republican), was signed into law by Governor John Richard Kasich (Republican) on 1 July 2011. The bill moves the partisan and Presidential primaries from the 1st Tuesday after the 1st Monday in March (in Presidential election years) to the 1st Tuesday after the 1st Monday in May.

A 19 August 2011 report in The Columbus Dispatch, Election-law opponents get small window to gather signatures, states that opponents of HB 194 are gathering signatures to overturn the bill. If they are successful, the Presidential Primary would be moved back to 1st Tuesday after the 1st Monday in March.

On 12 September 2011, state Senator Keith Faber (Republican) introduced SB 217. In the event HB 194 is overturned, this bill, like HB 194, moves the partisan and Presidential primaries from the 1st Tuesday after the 1st Monday in March (in Presidential election years) to the 1st Tuesday after the 1st Monday in May.

On 13 September 2011, state Representatives Louis W. Blessing, Jr. (Republican) and Sean O'Brien (Democratic) introduced HB 318. The bill eliminates the March primary elections in presidential election years by requiring all primary elections to be conducted on the first Tuesday after the first Monday in May.

22 September 2011: Ohio's primary will be in March - The Daily Record.

22 September 2011: Section 3 of HB 319 (Congressional district boundaries) sets the date of the 2012 statewide and Presidential primaries to 6 March 2012.

20 October 2011: The state Senate passed an updated version of HB 319. The bill calls for a 12 June 2012 Presidential and U.S. House primary and a 6 March 2012 primary for the U.S. Senate and state legislature.

On 21 October 2011, the Ohio House of Representatives passed HB 319 and Governor John Kasich signed the bill into law. Ohio will hold a 6 March 2012 primary for the U.S. Senate, state Legislature, and County offices and a 12 June 2012 primary for President and the U.S. House.

14 December 2011: The Ohio Legislature passed HB 369. This bill moves the statewide and Presidential primaries to 6 March 2012.

On 15 December 2011, Ohio Governor John Richard Kasich (Republican) signed HB 369. The law moves the statewide and Presidential primaries from Tuesday 12 June 2012 to Tuesday 6 March 2012.