Sen. Bernie Sanders (I-Vt.) sits alone at the inauguration ceremony in a beige parka, legs and arms crossed, socially distanced. Hugging his hands are a pair of large mittens bearing a white and brown pattern. They look soft. They look warm. They look vaguely familiar.

Of all the historic images from the inauguration of Joe Biden as the 46th president, this might be the most unexpected. But a photo of Sanders bundled up against the Washington cold went viral almost immediately.