After BJP's thumping victory in Tripura assembly elections, Jitendra Singh, Minisiter for Northeast region, said that under the leadership of Prime Minister Narendra Modi and BJP president Amit Shah, the demarcation of hinterland and mainland have vanished and northeast is part of the mainland India just like any other state. It's a huge vindication, gratification for us that the message has reached to the people of Tripura, he said.