President Trump’s promise to defend persecuted Christians in Nigeria has put Abuja on the back foot and thrust Africa’s most populous country into the president’s unpredictable crosshairs.

Trump threatened over the weekend to mobilize American troops against Islamist terrorists killing Christians, blaming Nigeria’s leaders for failing to tackle the problem and labeling it a "country of particular concern" (CPC) because of religious violence.

The designation compels the president to consult with the designated government, draft up a foreign policy action plan, and consult with Congress about implementation — within 90 days.

Trump also threatened to cut off aid and assistance to Nigeria barring meaningful action.

Here’s what to know

Christian right has lobbied for CPC designation

The C

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