Sandi Jackson, the wife of beleaguered former congressman Jesse Jackson Jr., has resigned from the Chicago City Council, citing "very painful family health matters." She served as an alderman from the 7th ward. 

"As Sandi takes this time to focus on her family, we give her our deepest thanks and support for her service to our City and the residents of her ward.  Her leadership has been greatly appreciated in the Chicago City Council," Chicago Mayor Rahm Emanuel (D) said in a statement. The resignation is effective Tuesday.

Jesse Jackson Jr., facing a federal investigation and struggling with bipolar disorder, resigned from Congress just before Thanksgiving. His wife has been criticized for missing multiple city council meetings.

In December, Jackson vowed to finish her term as alderman "unless something catastrophic happens."