Jindal didn’t appoint Cao, he won the election after it was moved back due to a natural disaster interfering with the timing of the primary.
And the DCCC doesn’t need to spend a single penny to take that seat back, it’s so minority-heavy.
Stand corrected, Cao ran as an Independent candidate for Louisiana Legislature in 2007 and Jindal appointed him as a member of the Board of Elections for Orleans Parish and supported him in his run for Congress as a “Republican”.