This section is from the book "The Constitutional Law Of The United States", by Westel Woodbury Willoughby. Also available from Amazon: Constitutional Law.
It is constitutionally provided that conviction upon impeachment must result in removal from office. To this may be added disqualification to hold and enjoy in the future any office of honor, trust, or profit under the United States. Where a criminal offense has been committed the party convicted is still "liable and subject to indictment, trial, judgment and punishment according to law."
The power of the President to grant reprieves or to pardon does not extend to cases of impeachment.
 
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