A 2019 video of a Kamala Harris campaign event made the rounds on the internet Friday night after the Democrat presidential hopeful unveiled some of her economic proposals, including her apparent desire for Soviet-style price controls on groceries. During her ill-fated run for president, the now vice president said she could lower prices on drugs simply by having the government seize patents from pharmaceutical companies and “take over.” That’s not how a free-market economy is supposed to work, but the giddy Harris didn’t care: “My plan, as a candidate for president, on these drug prices is as follows: We are...