Sinn Féin president Gerry Adams is due to meet the Bush administration's special eonvoy to the North later this week to discuss the current deadlock in the peace process.
Mr Adams is due to meet Mitchell Reiss in Washington on Wednesday as part of a week-long tour of the United States.
It will be the first meeting between the two men since the re-election of President George W Bush last week.
Speaking ahead of the talks, Mr Adams said: "The US continues to be a vital component in securing the peace process and the implementation of the Good Friday Agreement.
"Wednesday's meeting with Mitchell Reiss will provide an early opportunity in the wake of last week's presidential election to urge all those in the US and particularly within the administration to continue to play this important role."