Elon Musk rocketed out of the Beltway this week having blown a golden opportunity to make bigger, better and more beautiful changes to the way the American people are served by their government.

Trump credited Musk with “a colossal change in the old ways of doing business in Washington” and said some of his staff would remain in the administration.

Mr. Trump praised Mr. Musk as “one of the greatest business leaders and innovators the world has ever produced,” and said Mr. Musk would continue to advise the administration on cutting costs.