The Irish branch of Amnesty International is writing to the two US presidential candidates asking them to allow the Irish authorities to search US military planes at Irish airports.
The organisation says the Irish Government has failed to push for inspections on suspected US 'rendition' flights.
The Government is believed to reluctant to upset the Bush administration and risk an unfavourable response.
Amnesty says it is now writing to Barack Obama and John Mc Cain asking them to ensure that Irish authorities will be allowed to carry out inspections without any negative repercussions.
It says it has been forced to look to the US because the Irish Government will not show leadership on the issue.