Warren needs to take a lesson from Leonard Read's "I, Pencil."

Sen. Elizabeth Warren (D–Mass.) is promising to protect Americans from the scourge of…pencils?

In a new video posted to Twitter over the weekend, the presidential candidate promises to create a new federal agency that would expand on the protectionist measures undertaken by Donald Trump. She's even borrowing Trumpian rhetoric for the project, which she calls "economic patriotism," as she promises that a Warren administration would put the interests of American workers first.

Warren's attack on corporations that supposedly harm Americans by shifting jobs overseas is full of intellectual dishonesty and economic fallacies. Rather than making a case for greater government involvement in the corporate boardrooms of America, the video succeeds only at highlighting how misinformed and misguided such interventions are, regardless of whether they are executed by Trump or Warren.

"There are a lot of giant companies who like to call themselves 'American,' but face it: they have no loyalty or allegiance to America," she says in the video.

As proof, Warren points to the "famous no. 2 pencil," which is mostly manufactured in Mexico and China. Her video doesn't make clear why pencils should have to be made in America—or why that lack of good, pencil-making jobs in America is a problem.

That Warren chose to use pencils to illustrate the supposed need for "economic patriotism" is darkly hilarious to anyone familiar with "I, Pencil," Leonard Read's 1958 parable about the merits of free markets and comparative advantage. Reed's lesson is that no one on the planet has the means or knowledge to make an item as mundane and ubiquitous as a simple pencil. A pencil requires wood, graphite, brass, and rubber, but each component part is the result of supply chains that might stretch around the world—from the forests of the Pacific Northwest to the mines of Mexico to the factories of Indonesia.