And it isn't to perform an extra-constitutional impeachment.

The Illinois Supreme Court has refused to hear a challenge to Gov. Rod Blagojevich's fitness to hold office.

A spokesman said Wednesday that the court rejected the challenge without comment.

Attorney General Lisa Madigan had argued Blagojevich's legal and political troubles are keeping him from performing his duties. He has been charged with seeking kickbacks in choosing a successor for President-elect Barack Obama in the U.S. Senate.

Madigan argued that the governor's problems amount to a disability, so Blagojevich should have his authority removed temporarily.

My guess is that the court internally adopted a theory something akin to what I outlined here. However, they didn't need to explain their decision not to take the case, and did not. Now the ball is in the court of the branch constitutionally charged with dealing with impeachment.