Alexandra Petri: Trump also has a plan! His plan is for nothing to go wrong.

FILE - In this Feb. 15, 2018, file photo, President Donald Trump speaks in the Diplomatic Room at the White House, in Washington, about the shooting in Parkland, Fla. When shots rang out at a high school in Parkland, Florida last year, leaving 17 people dead, Trump quickly turned his thoughts to the need for more mental institutions. When back-to-back mass shootings in Dayton, Ohio, and El Paso, Texas, jolted the nation earlier this month, Trump again raised the need for “building new facilities” for the mentally ill as a way to prevent mass shootings. (AP Photo/Carolyn Kaster, File) First off, do not worry about the economy. There is nothing to worry about. Who's worried? If you were to worry, that would make the economy second-guess itself and grow agitated. Don't worry about the economy. It's fine. Worry about the Space Command.

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