Virtually expressing her party's reservation about the candidature of Ram Nath Kovind, Trinamool Congress Chief Mamata Banerjee today claimed that the Bihar Governor was nominated only because he had been a leader of the BJP's Dalit Morcha in the past. <br/><br/>She said, there are other big Dalit leaders in the country who could have been considered for the post. In a statement, Ms Banerjee said, in order to support someone, one must know the person. <br/><br/>Ms Mamta however, said, that she, not for a moment, saying that Bihar Governor Ram Nath Kovind is unfit for the post of president. <br/>'<br/><br/>