Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/shields-brooks-on-chris-christie-s-rnc-speech-negative-ads Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Story Time for the PBS NewsHour Doubleheader in the Google Hangout! Mark Shields and David Brooks took questions from viewers and correspondent Hari Sreenivasan on Wednesday at the Republican National Convention. Mark Shields and David Brooks discuss a campaign’s recourse in the face of negative advertising and New Jersey Governor Chris Christie’s RNC speech.