Musk has promises to keep, and new obstacles in his Twitter quest

A loose confederation of libertarian-leaning Musk lovers ponied up. But now the SEC is looking into the bid and Musk's Tesla stock, a big part of making the deal happen, is crashing.

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Everyone but Elon Musk has stepped back to assess whether his deal to buy Twitter will actually happen. To borrow a phrase from the poet Robert Frost: Musk has promises to keep, and months to go before he can tweet in private …