STRIPPED of their bureaucratic carapaces, T.N. Seshan and Mani Shankar Aiyer are having a hard time dealing with the slings and arrows of realpolitik. Seshan, who sought to ride the Shiv Sena tiger to the Lok Sabha, finds himself unceremoniously dumped. Aiyer, cast adrift from his (Nehru-Gandhi) dynastic moorings, is fighting a lone battle as an independent in Tamil Nadu's Mayiladuthurai constituency which he represented from 1991-96.