When a Protestant converts to Catholicism the Catholic Church does not baptize them again because they have already been baptized in another Christian church. Catholics recognize Protestants as Christian.
Yes I know, but nonetheless, that seems to be the path taken by Jindal.
Supposedly “According to outgoing SBC President Frank Page, Louisiana Governor Bobby Jindal was “baptized and led to Christ by Tommy French,” a well-known Southern Baptist who pastors Jefferson Baptist Church in Baton Rouge, Louisiana.”
When I was in a Catholic high school in the 60s, we learned that in the case of a Protestant converting to Catholicism, he received "conditional Baptism" -- i.e., "If thou art not already baptized, I baptize thee ..."
In some cases people are re-baptized because the original Baptism formula was not followed.