Tesla’s board of directors was urged to put its foot down and rein in CEO Elon Musk after the electric car maker’s stock tanked following the mercurial mogul’s vow to launch a rival political party.Wedbush Securities analyst Daniel Ives penned a bluntly worded note on Tuesday calling on the board to “act now” and establish formal boundaries around Musk’s political activities, warning that his increasing entanglement in Washington could threaten the company’s future.Ives, a Tesla hawk who is known to be plug ...