From NBC's Sue Kroll
U.S. offcials said Wednesday that the U.S. was disappointed by news that the Iraqi Vice President vetoed a key part of Iraq's election law.
"We urge the Iraqi leaders and parliament to to take quick action," State Department Spokesman Ian Kelly said.
The move raises doubts that the election may not happen on time. The Iraqi constitution mandates the elections happen before the end of January.
The delay could affect U.S. plans for a withdrawal from Iraq, set to begin in 2010.