The three powers that are assigned exclusively to the Senate are:
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Ratify treaties - The Senate has the exclusive power to ratify treaties negotiated by the President, requiring a two-thirds vote to do so.
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Try cases of the impeachment of federal officials - The Senate is responsible for conducting the trial for impeached federal officials, requiring a two-thirds majority for conviction.
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Confirm Presidential appointments - The Senate has the power to confirm or reject presidential appointments to the federal judiciary, cabinet, and other key positions.
The other options, such as impeaching federal officials and initiating revenue bills, are powers held by the House of Representatives or require involvement from both chambers.