Shares of electric vehicle maker Tesla tumbled 8% in morning trading as the feud between CEO Elon Musk and Trump reignited over the weekend.

Dan Ives, an analyst with Wedbush, wrote that Musk's continued push into politics is "exactly the opposite direction" investors want to see.

Mr. Musk’s involvement in politics and his financial support for the president’s campaign was once seen by investors as a benefit to Tesla, fueling a steep rise in company shares after the election last year. That association has now turned into a liability. Tesla shares are down 40 percent from their peak in December.