Each Friday, I look at what the presidential contenders are saying about foreign policy. This Week: China is following Russia’s lead in meddling in the U.S. presidential election.

Why do public office holders in Nigeria increasingly appoint a large number of personal aides?

[Voters in Africa’s most populous country and largest economy cast ballots for a new leader in the Feb. 25 Nigerian general elections. Here are answers to some essential questions about the vote]

International attention has been focused on the devaluation of the national currency, the naira, but there have been important security developments meanwhile. Militants, called the “Niger Delta Ave…

Last week, in response to long-standing FOIA requests, the CIA declassified—with significant redactions—five documents related to the terrorist attacks on September 11, 2001. The most notable was a J…