ISTANBUL, Nov 5 — Barisan Nasional (BN) chairman Datuk Seri Dr Ahmad Zahid Hamidi has reminded all party machinery to exercise restraint and conduct their campaigning responsibly... Ahmad Zahid, who is also Umno president, said that while campaigning between BN and Perikatan Nasional (PN) had intensified, there had also been several clashes that should have been avoided.