"He could be more active in terms of picking up the phone and calling people," Feinstein said.

According to The Bee, Feinstein recalled how former Democratic President Clinton often called lawmakers, who then felt flattered when the president made a personal call to seek support for a bill, helping move his agenda.

"I'm not sure [Obama] understands that," Feinstein said.

Feinstein is in a reelection campaign against Republican Elizabeth Emken, who is not expected to be a threat to the 79-year-old lawmaker.