Nov 23 (Reuters) - U.S. President Donald Trump said in a Twitter message on Friday that he was "extremely happy and proud" with Treasury Secretary Steven Mnuchin's performance, after the Wall Street Journal reported that the president had expressed dissatisfaction with Mnuchin. "I am extremely happy and proud of the job being done by @USTreasury Secretary @stevenmnuchin1," Trump said in a tweet. "The FAKE NEWS likes to write stories to the contrary, quoting phony sources or jealous people, but they aren’t true. They never like to ask me for a quote b/c it would kill their story," he said (Reporting by Mohammad Zargham in Washington Editing by Toni Reinhold)