Frontrunner John Kerry won the primary with Senator John Edwards obtaining over 20% and receiving delegates.
A 15 percent threshold was required in order to receive delegates at any caucus site.
Both McCain and the third-place candidate Mitt Romney received delegates along with Huckabee.
June 3 - Barack Obama receives enough delegates by the end of state primaries to be the presumptive Democratic Party of the United States nominee.
A 15 percent threshold is required to receive delegates.
Many states require that candidates receive at least 15% of the total votes to receive delegates.
Under Democratic Party rules, all delegates are awarded via proportional representation, with a minimum 15% threshold required to receive delegates.
According to New Hampshire law, delegates are allocated proportionally with a minimum 10% threshold required to receive delegates.
In the Iowa caucuses, he finished fifth, receiving about 1% of the state delegates from Iowa; far below the 15% threshold for receiving national delegates.
The same threshold applied at the state convention; candidates needed a support threshold of 15 percent to receive delegates at the Democratic National Convention.