The three powers that are assigned exclusively to the Senate are:
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Try cases of the impeachment of federal officials - The Senate conducts the trial for officials impeached by the House of Representatives.
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Confirm Presidential appointments - The Senate has the authority to confirm or reject Presidential appointments to the federal judiciary, cabinet, and other key positions.
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Ratify treaties - The Senate must approve treaties negotiated by the President before they become effective.
So, the correct responses are:
- Try cases of the impeachment of federal officials.
- Confirm Presidential appointments.
- Ratify treaties.