Enough. :-( It would at least trash the stock price. Recall that Tesla still needs to raise more money, and a low stock price is bad for money-raising. I think in the unlikely event that the deal gets voted down, the most likely scenario is a tremendous crash in the stock, lack of access to the borrowing markets (remember, it matters what those banks who lend money think), followed by an *extremely* dilutive stock issuance.
As a stockholder I would rather avoid a severe dilution.
I still think the merger is *extremely* likely to be approved.