Primary

The 20 delegate allocation was proportional among candidates who received at least 25% of the statewide vote. Candidates who did not reach the 25% threshold lost the delegates they otherwise would have won, and those delegates became uncommitted then.^[6]

On March 24, Rick Santorum was declared the winner of the state's primary.^[7]

2012 Louisiana Republican primary

Candidate	Votes	Percentage	Projected delegate count
			GP [8]	CNN [9]	MSNBC [10]
Rick Santorum	91,321	48.99%	10	10	10
Mitt Romney	49,758	26.69%	5	5	6
Newt Gingrich	29,656	15.91%	0	0	0
Ron Paul	11,467	6.15%	0	0	0
Buddy Roemer	2,203	1.18%	0	0	0
Rick Perry	955	0.51%	0	0	0
Michele Bachmann	622	0.33%	0	0	0
Jon Huntsman, Jr.	242	0.13%	0	0	0
Randy Crow	186	0.10%	0	0	0
Unprojected delegates:			5	5	4
Total:	186,410	100.00%	20	20	20

^[11]

Caucuses, delegate dispute, and ultimate agreement

Although Ron Paul won just 6% of the vote in the primary on March 24 (in which almost 190,000 voters cast ballots), he carried four of Louisiana's six congressional districts in the congressional district caucuses held the following month (in which fewer than 10,000 people took part).^[12]

Paul's showing in the April district caucuses "guaranteed him 12 of the state's 46 national convention delegates and, as important, gave his forces 111 of the 180 delegates to the state convention," which chose the actual delegates to the 2012 Republican National Convention in Tampa, Florida.^[13][12]

In advance of the June 2 Louisiana State Republican Convention in Shreveport, pro-Paul delegates and others clashed with officials and loyalists of the state Republican Party, which "issued supplemental rules on the eve of the convention to keep the Paul forces from wresting more than the 17 delegates which, in their view, was their due."^[12] The convention itself was described as a "riotous" and chaotic scene, as the police removed two Paul supporters, arresting one, and the convention devolved into two separate conventions, "as the Paul delegates turned their chairs around and conducted their convention facing one way, while the state party and its loyalists conducted their parallel convention facing the other."^[12]

The split convention resulted in two rival slates of 46 delegates.^[12][14] The national Republican Party accepted the slate submitted by Louisiana Republican Party chairman Roger Villere as the official slate.^[14] In late July, however, Paul's campaign announced that it would challenge all the Louisiana delegates, asserting that "our rump convention is the legitimate delegation and they have a right to be seated at the Republican National Convention."^[15] In its official challenge to the delegate slate filed in August, Paul's campaign likened Villere to the leader of "a North Korean politburo"; in response, the executive director of the Louisiana Republican Party said that Paul's challenge was "full of personal attacks, hyperbole and unfounded assumption."^[16] The dispute was to be adjudicated by the Contest Committee of the national Republican Party, with a possible appeal to the full Republican National Committee and then to the Credential Committee of the convention.^[12] However, in late August—one week prior to the convention—the Paul campaign made an agreement with the Republican Party of Louisiana in which Paul would get 17 of the state's 46 delegates, with the rest of the state's delegates supporting then-presumptive nominee Mitt Romney.^[17]