President Donald Trump thinks no one knows what a magnet is. The polarizing president was in conversation with Fox News about the economy when he veered off track to discuss China and magnetic trains. āPresident Xi was willing to do the railroad thingsāthatās magnets,ā he said. āNow, nobody knows what a magnet is. If you donāt have a magnet, you donāt have a car. You donāt make a computer, you donāt make, er, televisions and radios and all the other thingsāyou donāt make anything. Itās a 30-year effort to monopolize a very important thing. Now, in two years, weāll have magnets, all the magnets we want. Because of tariffs, listen I called, I said youāre going to play the magnet, weāre going to play the tariff on you.ā His confusion over magnetism is well documented, and the record suggests he was being sincere when he said, āNo one knowsā what they are. During his diplomatic tour of Asia, Trump,79, stood in front of servicepeople of the U.S. Navy and said, āYou know, the new thing is magnets. So instead of using hydraulic that can be hit by lightning, and itās fine. You take a little glass of water, you drop it on magnets. I donāt know whatās going to happen.ā