reporter: a committee aide tells cnn that eastman could still avoid a subpoena if he voluntarily cooperates with the investigation. on tuesday, representative jamie raskin said the committee wants to know more about the pressure pence faced. we need to determine to what extent there was an organized effort against vice president pence. and we believe that, you know, some of the actors names have become known including john eastman who laid it out in a memo. reporter: eastman authored a two-page memo laying out what they ve called a nonsense legal theory for republican officials to subvert the constitution and throw out president biden s victory when congress convened to count electrical college votes. eastman first tried to convince pence of the plan to kick election results back to the states during a meeting with trump in the oval office on january 4th. but eastman didn t succeed. he tried again on january 6th. and all we are demanding of