http://twitter.com/#!/baseballcrank/status/235081825146507264

As Twitchy has reported, Rep. Jesse Jackson Jr. (D-Ill.) had taken medical leave, but the reasons for doing so remained secretive. Speculation abounded, but today reports are confirming that he is being treated for bipolar disorder.

Congressman Jesse Jackson Jr mystery illness identified. Doctors say he's being treated for bipolar disorder.

— Lisa Remillard (@LisaRemillard) August 13, 2012

Update from Mayo Clinic on Jesse Jackson Jr: Undergoing treatment for bipolar depression, responding well to treatment & regaining strength

— CBS News Politics (@CBSPolitics) August 13, 2012

Twitter users reacted with sympathy, yet also concern: Will he remain in Congress?

I'm perfectly willing to start feeling bad for Jesse Jackson Jr's serious mental illness the minute he is no longer in Congress.

— Dan McLaughlin (@baseballcrank) August 13, 2012

wishing him well “@AP: BREAKING: Mayo Clinic: US Rep. Jesse Jackson Jr. under treatment for bipolar disorder”

— Chely Wright (@chelywright) August 13, 2012

Twitchy will monitor the situation and update accordingly.

Update:

from @AP: Mayo Clinic says Rep. Jesse Jackson Jr. has bipolar depression http://t.co/itXXgPra

— Jesse Washington (@jessewashington) August 13, 2012

More from the Associated Press:

CHICAGO (AP) – Doctors say Congressman Jesse Jackson Jr. is under treatment for bipolar disorder.

A release Monday from the Mayo Clinic states that the Democrat underwent an extensive evaluation and is responding well to treatment for the disorder at the facility in Rochester, Minn. The release says Jackson is regaining his strength.

Jackson spokesman Frank Watkins declined to comment.

Read more: http://twitchy.com/2012/08/13/rep-jesse-jackson-jr-being-treated-for-bipolar-disorder/