“We’ve known each other for a long time, and have worked together on many issues that are important to the people of San Diego — from creating jobs to protecting the environment to helping our veterans,” Boxer wrote. “So I am speaking to you now on a personal and professional level, and asking you to step down as mayor and get the help you need as a private citizen.”

Boxer explained that while she has commented publically that Filner should resign, she felt the need to address him directly.

“I must say this directly to you: Bob, you must resign because you have betrayed the trust of the women you have victimized, the San Diegans you represent and the people you have worked with throughout your decades in public life,” she wrote.