State whose panhandle touches British Columbia

IDAHO

This Gem State shares a narrow border with Canada just east of Washington.

This clue points to Idaho because it’s the only U.S. state with a narrow panhandle that extends far enough north to border British Columbia, Canada. The term "panhandle" refers to the thin, protruding strip of land in the state’s northern region. No wordplay is involved—it’s a straightforward geography reference.