Senate Historian: Have yet to find a precedent for GOP Senate letter

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http://www.politicususa.com/2015/03/11/u-s-senate-historian.html

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McClatchy reported:

The U.S. Senate Historian’s Office has so far been unable to find another example in the chamber’s history where one political party openly tried to deal with a foreign power against a presidential policy, as Republicans have attempted in their open letter to Iran this week.
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We haven’t found a precedent,” said Senate Historian Donald Ritchie. “That doesn’t mean there isn’t a precedent. After 200 years. It’s hard to find anything that unprecedented.”

In the past, Ritchie said, “what usually happened is a senator would sign a ’round robin’ letter or a sense of the Senate resolution, or write a letter to the president or secretary of State voicing objections to some particular policy.”
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