From the Minneapolis Star Tribune: Shooter had a plan, FBI says

"Democrats on the House Judiciary Committee called on Judiciary Committee Chair James Sensenbrenner, R-Wis., to take 'immediate committee action' in response to the shooting.

'It is difficult for us to conceive of a more pressing public policy matter than protecting our children from school violence,' the Democrats wrote."

While I'm not sure what types of legislative measures could have prevented this horrible event, it's certainly worth holding hearings on the problem of school violence, what causes it and what role the government should play in trying to prevent more incidents like this from happening.