Lead: One hundred and fifty years ago the Republic was facing its greatest crisis. This continuing series examines the American Civil War. It is "A House Divided."

Intro.: A Moment in Time with Dan Roberts.

Content: Despite its reputation for inertia, the U.S. Congress on occasion is capable of electrifying and revolutionary activity. But if the truth be known, such seasons of spectacular innovation occur more often than not when a single political party is in close to absolute control of the levers of congressional power and Congress is driven by an determined President of the majority party with visionary ambitions.