Elon Musk’s tumultuous US$44 billion bid to buy Twitter is on the verge of collapse – after the Tesla CEO sent a letter to Twitter’s board on Friday saying he is terminating the acquisition. The chair of Twitter’s board, Bret Taylor, tweeted on Friday that the board is “committed to closing the transaction on the price and terms agreed upon with Mr. Musk and plans to pursue legal action to enforce the merger agreement. We are confident we will prevail in the Delaware Court of Chancery.” Twitter could have pushed for a US$1 billion break-up fee Musk agreed to pay…