This is the standard view. Maybe there’s something to it. But TR did bring antitrust cases (even though prices were falling for consumers in each case). And it’s just confusion to say Wilson favored antitrust but supported laissez faire; the two are at odds with each other. And the Federal Trade Commission and the Department of Labor sound like business regulation to me. The textbook should say that both men favored some kind of federal oversight of business, rather than claiming that one was laissez faire and one wanted regulation.