President Hakainde Hichilema was elected five years ago, promising to protect civil liberties in his copper-rich African nation. Now, he’s accused of trampling on them.

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The party’s congressional campaign arm added Mr. Miller’s opponent, Brian Poindexter, to its highly competitive “Red to Blue” list.

© Daniel Lozada for The New York Times

The party’s congressional campaign arm added Mr. Miller’s opponent, Brian Poindexter, to its highly competitive “Red to Blue” list.

© Daniel Lozada for The New York Times