The appeal of an outsider—particularly in a country beset by corruption—can be strong. But outsiders can also be risky bets.

The run-off between incumbent Petro Poroshenko and comedian Volodymyr Zelenskiy, Ukraine-watchers say, is part of a struggle going back years.

Volodymyr Zelenskiy, triumphing in Ukraine's first round of presidential elections, has become the world's latest entertainer-politician.

Poroshenko wants his nation to forget its role in Nazi atrocities

But this week's summit is a win for the U.S.

Members on opposing sides are barely speaking to each other

Russia's gas cutoff and the possibilities for peace