Nitish Kumar's Janata Dal United formally decided to head back to the BJP-led National Democratic Alliance or NDA on Saturday that it had exited abruptly in 2013 ending a partnership that had lasted nearly two decades. The homecoming for the JD (U) comes weeks after the Bihar Chief Minister exited the grand alliance with the Congress and Lalu Yadav's RJD, a rainbow coalition that the opposition believed was the template to prevent the BJP's return in 2019.