PM Modi was in an interview with a daily when a reporter asked him about his challengers during the election time? Is it Rahul Gandhi or Mayawati or Mamata Banerjee? He replied, "My biggest challenge is myself. How could I stop when I can do a lot more? I have challenged myself and surpassed every time. I have tried to improve. I am challenging myself that in the next 5 years I'll work faster to achieve dreams of people?"