. >> reporter: bernadette myler is a stanford constitutional law professor. >> i wouldn't be surprised if this were final judgment. >> reporter: tesla ceo elon musk began the morning with a series of tweets, threatening to pull his headquarters and the fremont manufacturing site out of california. some industry analysts say it may not be an idle threat. >> every day he's not creating cars, he's losing money. secondly, he has a huge list of people who are waiting teslas, especially the model 3. but they've got orders for every model. >> reporter: county leaders say they've been working with tesla on a safety plan to protect its thousands of employees. >> i don't want to lose tesla, which is the reason i've been working very hard for them. >> reporter: and fremont's mayor echoed concerns about the impact of local economy, saying she believes manufacturing work can proceed safely with proper social distancing. i'm roz plater, nbcne. >> look at the timeline here, the fremont factory shut down on march 23rd. april 29th, tesla released its first quarter earnings which showed a profit. just y