Here's a 2003 newspaper article about Larry Franklin mentioning antagonism between Colin Powell and Donald Rumsfeld:
"Administration officials said at least two Pentagon officials working for the Undersecretary of Defence for Policy, Douglas Feith, have held 'several' meetings with Manucher Ghorbanifar, the Iranian middleman in United States arms-for-hostage shipments to Iran in the mid-1980s. The officials who disclosed the secret meetings said the talks with Mr Ghorbanifar were not authorised by the White House and appeared to be aimed at undercutting sensitive negotiations with Iran's Government. A senior Administration official said the US Government had learned about the unauthorised talks by accident.
"The senior official and another Administration source said the ultimate objective of Mr Feith and a group of neo-conservative civilians inside the Pentagon is change of government in Iran. The immediate objective appeared to be to 'antagonise Iran so that they get frustrated and then by their reactions harden US policy against them'. The official confirmed that the Secretary of State, Colin Powell, complained directly to the Defence Secretary, Donald Rumsfeld, several days ago about Mr Feith conducting missions that went against US policy.
"A spokesman for Mr Feith's Near East, South Asia and Special Plans office, which sources said played a key role in contacts with Mr Ghorbanifar contacts, ignored an emailed inquiry about the talks. The senior Administration official identified two of the defence officials who met Mr Ghorbanifar as Harold Rhode, Mr Feith's top Middle East specialist, and Larry Franklin, a Defence Intelligence Agency analyst on loan to the undersecretary's office..."