Question: For what administration did the person, whom Ann O'Leary worked for in regards to the 2008 and 2016 presidential campaigns, become the United States Secretary of State?
Sentence (from "NGP VAN"): The company's services have been utilized by clients such as the Obama 2008 presidential campaign, the Obama 2012 presidential campaign, the Bernie Sanders 2016 presidential campaign, the Hillary Clinton 2016 presidential campaign, the British Liberal Democrats, and the Liberal Party of Canada.
Relevant evidence: No