Before backing the former Massachusetts governor, she campaigned for former Sen. Fred Thompson of Tennessee, who abandoned his White House race last week after his campaign failed to gain traction, CNN reported.
Cheney, 41, was the principal deputy assistant secretary for Near Eastern Affairs at the State Department. She stepped down from the senior-level post in 2006, according to CNN.
She also worked in the State Department from 2002 to 2003, before leaving to work on her father's re-election campaign.
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