Walt Whitman doesn’t often get name-checked by rock bands, but Canada’s Wintersleep drew inspiration from the influential 19th-century poet in the trio’s new song, “Amerika.” Speakeasy premieres the track today.

It’s a big, bold song, revolving like a slow-motion tornado around huge guitars, a booming rhythm and singer Paul Murphy’s plangent vocals that take on a chant-like quality on the chorus.

The...