Former Bihar chief minister Nitish Kumar on Saturday called on Rashtriya Janata Party (RJD) chief Lalu Prasad Yadav to seek his support for Janata Dal-United candidates contesting for seats in the Rajya Sabha polls in the state.br br The JD-U has fielded Sharad Yadav, Pawan Verma and Ghulam Rasool for the three Rajya Sabha seats.br br Meanwhile, rebel JD-U leader Sabir Ali has also filed his nominations as an independent candidate.