Conversation so far:
What role did Joe Lieberman play in the creation of DHS?
When control of the Senate switched from Republicans to Democrats in June 2001, Lieberman became Chairman of the Homeland Security and Governmental Affairs Committee.
Did this lead to the creation of the department?
One month after the terrorist attacks on September 11, 2001, he introduced legislation to reorganize the federal government to better protect the American people.
Was this legislation popular?
After months of opposing the plan, the White House eventually endorsed the concept.

Question: What happened next?
Self-contained rewrite: What happened after the White House endorsed the concept of reorganizing the federal government?