Republicans are coming for your blue M&Ms

A close-up image shows a bowl of blue M&M candies. | Peter Macdiarmid/Getty Images If you were anything like me as a kid, trick-or-treating meant one, maybe two, pillowcases full of candy every Halloween.  And as fun as collecting all that candy could be, the real fun began when I got home and dumped my winnings onto my bedroom floor. That’s when the sorting began. I had some very specific rules: The usual suspects — think Smarties, Tootsie Rolls, and Dum Dums — went into one pile. Fun-size chocolates, like Snickers, Reese’s Peanut Butter Cups, and Baby Ruths, went into another. And then there was my prized pile: Skittles, Warheads, Starbursts, and Sour Patch Kids. Those were meant to be eaten slowly throughout November. The rest was fair game.  The ways we sort and eat our Halloween candy are decided by some very particular, personal rules. But Health and Human Services Secretary Robert F. Kennedy Jr. would like to add another distinction: Which candies are made with artificial dyes? Kennedy’s ire for synthetic food dyes is years old, and they’ve become a major target of his Make America Healthy Again movement. Last year, he announced a plan to remove “petroleum-based synthetic dyes” from foods, arguing...