While the impeachment investigation by House Democrats of President Trump’s dealings with Ukraine’s president is big news, the nature of the battle between the legislators and the U.S. president is not new. Lawmakers fighting for information over a president’s negotiations with foreign powers dates back to the birth of this nation, writes scholar Jennifer Selin, and includes both Democratic and Republican presidents.

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An impeachment inquiry was launched about President Trump’s dealings with the Ukraine on Tuesday. Reuters/Jonathan Ernst

Trump, Ukraine and a whistleblower: Ever since 1796, Congress has struggled to keep presidents in check

Jennifer Selin, University of Missouri-Columbia

The conflict between Congress and President Trump over his dealings with Ukraine's president is just the latest version of a long-running struggle for power between the two branches of government.

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