"I am concerned whether, and to what extent, the National Security Agency has received specific presidential authorization for the operations you are conducting."
This is a contemporaneous admission that Pelosi believed that all the NSA probably needed to proceed with their intercepts was a presidential finding. Of course now, Pelosi - and other Leftist Democrat dove appeasers - want to impeach Bush for doing just that. York has much more. RTWT. Here's a link to the NYTIMES article which included Pelosi's redacted letter.