Former president Pranab Mukherjee's son Abhijit Mukherjee today joined the Trinamool Congress, ending weeks of speculation and denial by him. "The way Mamata Banerjee halted the recent communal wave by BJP, I believe that in the future, with the support of others, she would be able to do the same in the entire country," said Abhijit Mukherjee, in his first comments after joining the Trinamool.