For a fee, Corey Lewandowski, President Trump’s pugilistic former campaign manager, and Barry Bennett, a former Trump senior adviser, will protect you from “tweet risk” — what happens to the stock price and reputation of your company when the president tells his 26 million Twitter followers that you’re killing factory jobs or refusing to sell Ivanka Trump handbags.

“If he’s gonna come after you, there’s nothing we can do to stop it,” Mr. Bennett said of Avenue Strategies, the firm he and Mr. Lewandowski opened in offices overlooking Mr. Trump’s White House bedroom window. “But if you want to figure out how to win in this environment, we can help you.

“We’re your sherpa through turbulent times.”

Mr. Trump has promised “to grow the economy 4 percent per year and create at least 25 million new jobs through massive tax reduction and simplification, in combination with trade reform, regulatory relief and lifting the restrictions on American energy.”