As Nitish Kumar's Janata Dal-United or JD(U) today discussed its strategy for the national election due by May, a senior party leader warned that Narendra Modi must not be underestimated. "The rise of Narendra Modi from a tea stall vendor to PM candidate is phenomenal. But he is out and out RSS man so he's threat to the democracy ," the JD(U)'s Shivanand Tiwari said at the opening session of the two-day meeting.