Had some fun "welcoming" Oprah to Twitter today — even though my wife only had eyes for Ashton Kutcher and I can’t come close (yet!) to matching his million plus followers. Kutcher made a good point about how twitter has the potential to open up political debate in the media. That’s what I like most about Twitter. Joining the Twitter conversation helps me figure out what viewers want to hear from politicians and policymakers, another tool for holding the powerful accountable. So, what questions do you all have for Rahm Emanuel and John Boehner — my exclusive guests on "This Week" Sunday? –George Stephanopoulos Follow George Stephanopoulos on Twitter, friend George on Facebook, and bookmark George’s Bottom Line blog.