Speaking of tinfoil, I have read another tinfoil explanation.
[tinfoil on]
President Bush wanted to replace Cheney with a more energetic Republican. Her Highness got into the picture, and she negotiated a secret deal with Bush to guarantee an easy win for Her Highness on 2008.
Her Highness will torpedo Kerry's campaign to ensure Bush's reelection, and in exchange, Bush would not give a headstart to a vigorous Republican by keeping old Cheney on his job.
[/tinfoil off]