Former President Pranab Mukherjee’s son, Congress MP Abhijit Mukherjee, joined the Trinamool Congress (TMC) in Kolkata on Monday. In the presence of senior TMC leaders, he was initiated into the party at a press conference in the city. Abhijit Mukherjee, a two-term Lok Sabha member from his father’s Jangipur constituency, has been in talks with the TMC leadership for a few weeks.