Defense seeks change of venue in Pelosi attack trial amid publicity concerns

David DePape pleaded not guilty to federal and state charges related to the attack.
Defense argues media coverage has biased potential jurors against DePape.
Lawyers unsuccessfully requested moving the trial from San Francisco to Oregon.
The attack occurred when DePape broke into the Pelosi home to allegedly kidnap Nancy Pelosi.
Paul Pelosi was severely injured after DePape assaulted him with a hammer.