Tun Dr Mahathir Mohamad is in for a five-cornered fight to defend his Langkawi parliamentary seat in the 15th General Election (GE15).br br The former prime minister will face Datuk Armishah Sirahlj of Barisan Nasional, Datuk Suhaimi Abdullah of Perikatan Nasional and Zabidi Yahya of Pakatan Harapan.