Kolkata: Union Minister and senior BJP leader Harsh Vardhan on Friday said Prime Minister Narendra Modi was politically invincible and there was no one to throw a challenge to him in next year’s general elections. “There is no one who can beat Narendra Modi... I do not think there is any challenge to him in 2019 (elections),” Vardhan said here. The Modi-led central government is under attack from the opposition over the depreciating rupee against the dollar, soaring fuel prices, and the Vijay Mallya case. (IANS)