Biden reiterated US government support for an "inclusive Iraqi government that reflects the results of the election," the White House said in a statement.

Biden, who oversees Iraq policy for President Barack Obama, and Barzani, president of Kurdish-ruled northern Iraq, agreed all winning coalitions should be included in the new government, the White House said.

"The Vice President expressed support for a meeting between the leaders of these coalitions to hammer out power-sharing arrangements in accordance with the constitution.

"The Vice President reiterated that the United States is not backing specific candidates and urged Barzani, as he is urging all Iraqi leaders, to expedite efforts to form an inclusive and legitimate government responsive to the needs of the Iraqi people," the statement said.