Nepal, Sep 18 (ANI): Reiterating Tarai-Madhesh Loktantrik Party's demand of amending the proposed Nepal Constitution, party leader Jitendra Sonal on Sunday said his party has both faith and doubt upon the present government with regard to the same. Asserting that Prime Minister Pushpa Kamal Dahal had promised of tabling the Madhesi's demands before departing for India, the minister added that his party and supporters will observe black day if the proposed constitution is implemented. Nepal Prime Minister Dahal is presently on a visit to India.