Conversation so far:
When did Tammy Duckworth start Tammy Duckworth's career in politics?
On November 21, 2006, several weeks after losing her first congressional campaign, Duckworth was appointed Director of the Illinois Department of Veterans Affairs.
What did she do after working in the Department of Veterans Affairs?
On February 3, 2009, Duckworth was nominated to be the Assistant Secretary of Public and Intergovernmental Affairs for the United States Department of Veterans Affairs.
When did she transition into other roles outside of the Department of Veterans Affairs?
Duckworth resigned from her position in June 2011 in order to launch her campaign for the U.S.
House of Representatives.

Question: Why did she resign?
Self-contained rewrite: Why did Tammy Duckworth resign from her position with the Department of Veterans Affairs? ?