Gonzales says it was okay to spy on Americans without authorization because the war resolution gave them that power. But when asked why they didn't ask for specific congressional authorization, he says, well, Congress wouldn't have given them that power.
Perhaps we should've paid closer attention to Bush's earlier civics lesson for us all:
The legislature's job is to write law. It's the executive branch's job to interpret law.
Shorter Bush & Gonzales:
We make the laws.