By Benjamin Horney (December 3, 2015, 7:45 PM EST) -- Staples Inc. is prepared to sell more assets in order to win antitrust approval for its $6.3 billion takeover of Office Depot Inc., Bloomberg report on Thursday. The news follows reports from earlier this week that said the Federal Trade Commission is planning to block the merger due to concerns that the deal will eliminate competition in the office-supplies industry. The deal, announced in February, has not had an easy road to completion. In addition to in-depth probes by the FTC and the European Commission, the deal has been the subject of at least one lawsuit filed by a union representing U.S. Postal Service workers who claim the proposed tie-up would create a monopoly....