Conversation so far:
What was happening in Jeff Tweedy's personal life?
Tweedy has been prone to migraines throughout his entire life, forcing him to miss forty days of elementary school in one year.
Did he ever figure out the cause?
attributes this to comorbidity with major depressive disorder and severe panic attacks.
Did he seek help for these issues?
he entered a dual diagnosis rehabilitation clinic in order to receive treatment for an addiction to prescription painkillers.
Did the treatment work?
Tweedy quit smoking the next year; John Stirratt claimed afterward that this significantly improved the focus of the band.
What did the band do next?
joined Wilco on stage at Madison Square Garden to play drums on their song "The Late Greats," while opening for Neil Young.
Were they on a tour with Neil young?
Monster.
In 2008, Spencer joined Wilco on stage at Madison Square Garden to play drums on their song "The Late Greats," while opening for Neil Young.
What else was going on in his personal life?
Sue was diagnosed with cancer in 2014.

Question: Who was Sue?
Self-contained rewrite: Who was Sue to Jeff Tweedy?