Final answer:
The Bush administration's preparation of secret plans for the invasion of Iraq shortly after 9/11, without involving military leaders or Congress, and the efforts to gain public support by linking Saddam Hussein to 9/11, is strong evidence supporting the idea of a 'premeditated invasion.'
Step-by-step explanation:
The paragraph that best supports the idea of a 'premeditated invasion' as referenced in other parts of the question is the one detailing actions by the Bush administration prior to the Iraq war. The statement outlines clear steps for an incursion, such as Bush ordering Rumsfeld to prepare secret plans for the invasion shortly after the September 11 attacks, the implementation of these plans without consulting military leaders or Congress, and the effort to rally public support by connecting Hussein to 9/11. This paragraph indicates a deliberate and systematic approach to preparing for the invasion of Iraq, providing strong evidence of premeditation.