Which Country Has an Exclave Bordering Both Russia and Canada?

Clarifying the Geography: Alaska is a U.S. State, Not a Country

The premise contains a geographical inaccuracy: Alaska is a state of the United States, not an independent country. However, it is the only U.S. state that borders both Russia and Canada.

• Russia: The maritime border separates Alaska's Seward Peninsula from Russia's Chukotka Autonomous Okrug across the Bering Strait (at its narrowest, about 55 miles / 88 km).
• Canada: Alaska shares a 1,538-mile (2,475 km) land border with Canada's Yukon Territory and British Columbia, including the area near the Yukon-Charley Rivers National Preserve.

No sovereign nation other than the U.S. (via Alaska) has territory bordering both Russia and Canada.