Prime Minister and Umno president Datuk Seri Najib Tun Razak has warned critics against trying to pit Datuk Seri Dr Ahmad Zahid Hamidi and Datuk Seri Hishammuddin Hussein against each other, adding that it was Dr Ahmad Zahid who suggested that Hishammuddin be appointed as Special Functions Minister. Najib said this on Friday when launching the Barisan Nasional Jalinan Rakyat Plus election machinery for the 14th general election.