MORANG: Former President Ram Baran Yadav said that all political parties should unite to end the existing political deadlock.. Talking to mediapersons at the Biratnagar Airport today, Yadav said that it would be difficult to end political stalemate unless major political parties came together. He viewed that the Constitution promulgated through democratic means should be a base to give an outlet to the country. Former President Yadav also said that all political parties including ruling parties, Nepali Congress and Madhes-based political parties should stand together for implementation of the Constitution a as well as formulation of new acts and laws. Yadav had reached Biratnagar to attend the fifth anniversary of New Shristi newspaper as the chief guest.