<span style="color: #222222;">West Bengal Chief Minister and TMC supremo Mamata Banerjee's former aide Sovan Chatterjee joined the BJP in New Delhi today. <br />''<br />''He is an MLA from Behala Purba assembly constituency of West Bengal. <br />''<br />''He was a Minister in Mamata Banerjee's government but resigned in November last year. <br />''<br />''The former mayor of Kolkata was inducted into the party by BJP leader and former TMC MP Mukul Roy.</span><br />