New York, May 2 -- About a month ago, with Tesla's stock sinking and some investors irritated about Elon Musk's White House focus, Tesla's board got serious about looking for Musk's successor, reported The Wall Street Journal (WSJ) on Thursday.

Board members reached out to several executive search firms to work on a formal process for finding Tesla's next chief executive, while tensions had been mounting at the company with sales and profits deteriorating rapidly, said the report.

The board narrowed its focus to a major search firm, according to the report. The current status of the succession planning couldn't be determined. It is also unclear if Musk, himself a Tesla board member, was aware of the effort, or if his pledge to spend mor...