Tuesday 24 April 2012 (cancelled): Primary. "Pursuant to Delaware State Law, if the Delaware Democratic Party submits the name of only one Presidential Candidate, and no other candidates file for the ballot, the state run Presidential Primary shall be cancelled. As of the filing deadline on February 24, 2012, only one candidate had filed for the ballot, therefore Presidential Preference shall be taken at the Representative District Caucuses being held from May 1-30."

Participation in Delaware's delegate selection process is open to all voters who are registered to vote as Democrats.

Tuesday 1 May - Wednesday 30 May 2012: Representative District Caucus meetings / Party-run Presidential Primary. 23 of 33 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's Delaware Presidential Primary. A mandatory 15 percent threshold is required in order for a presidential contender to be allocated National Convention delegates at either the "subdivision" or statewide level.

• Delaware, having only 1 Congressional District, has chosen to allocate their "District" delegates by City and County: 15 "subdivision level delegates" are pledged proportionally to presidential contenders based on the primary results in four "subdivisions"- 2 of the State's 3 counties, the State's largest city (Wilmington) and those portions of the remaining county outside that city. (as of 14 March 2012:)
• City of Wilmington: 2
• New Castle County (except for Wilmington): 8
• Kent County: 2
• Sussex County: 3
• 8 delegates are to be pledged to presidential contenders based on the primary vote statewide.
  • 5 at-large National Convention delegates
  • 3 Pledged PLEOs

President Obama was the only candidate to file. Ballots were distributed to the attendees. Since write-in votes are not accepted, the vote was 100% Obama.

Saturday 9 June 2012: State Convention in Dover

National Convention Subdivision ("District") level, Pledged PLEO, and At-Large delegates are elected according to the results of the primary.

The remaining 10 National Convention delegates consist of

• 10 Unpledged PLEO delegates:
• 5 Democratic National Committee members.
• 3 Members of Congress (2 Senators and 1 Representative).
• 1 Governor.
• 1 Distinguished Party Leader: Vice President Joseph Robinette "Joe" Biden, Jr.

These 10 delegates and will go to the Democratic National Convention officially "Unpledged".

Notes:

On 27 July 2011, Governor Jack A. Markell (Democratic) signed SB 89. The bill moves the Presidential Primary from the 1st Tuesday in February to the 4th Tuesday in April and was sponsored by state Senator Michael S. Katz (Democratic) and state Representative Earl G. Jaques, Jr, (Democratic).