Halligan also taught writing, American history, and American literature at a university in Wuhan, China, through the Princeton in Asia program.
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In 2009, Nina Totenberg of National Public Radio included Halligan's name on a list of possible nominees to the U.S. Supreme Court.
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On May 26, 2010, legal blogger Ed Whelan reported that President Obama has placed Halligan on "the inside track" to be nominated to one of two vacancies on the United States Court of Appeals for the District of Columbia Circuit.
Caitlín R. Kiernan | Caitlin | Caitlin Rother | Caitlin Bassett | Caitlin Atkins | Ursula Halligan | Julie Caitlin Brown | John and Caitlin Matthews | Danny Halligan | Caitlin's Way | Caitlin McDougall | Caitlín Maude | Caitlin Lever | Caitlin EJ Meyer | Caitlin Dulany | Caitlin Carmichael | Bob Halligan, Jr |