Opposition leaders gathered on Wednesday for the third time in less than a month in a show of unity and mounted a blistering attack against Prime Minister Narendra Modi and the BJP, saying the two should be ousted in the coming elections as they are a threat to democracy and constitutional values. In fiery speeches at a mega rally, West Bengal Chief Minister Mamata Banerjee asserted the situation in the country is more dangerous than emergency while her Delhi counterpart Arvind Kejriwal said people should not repeat the mistake of making a class 12 pass out as prime minister and they should back an educated leader.