Marshals Service, Secret Service, and Department of Justice. Fun fact: Jenna Bush Hager and her twin sister, Barbara Pierce Bush, have co-authored 5 books together, including a memoir and 4 picture books. Little-known fact: Bush Hager’s birth name is Jenna Welch Bush Hager. TL;DRJenna Bush Hager is an executive producer of NBC’s new scripted drama “Line of Fire.” Bush Hager has said her experience growing up around Secret Service protection helped inspire part of the show’s premise.