Barbara Mikulski, Longest Serving Female Senator in History, to Retire

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

U.S. Sen. Barbara Mikulski (D-MD) speaks during a news conference May 19, 2011, on Capitol Hill in Washington, DC. (Credit: Alex Wong/Getty Images)

Sen. Barbara Mikulski , the longest serving female senator in history, will retire at the end of her term, CNN reported Monday morning.

The Democrat will make the announcement Monday morning in her hometown of Baltimore.

Mikulski is known as the “Dean” of the Senate women — helping forge bipartisan relationships for decades that often result in compromise.

Until Democrats lost control of the Senate, she was the chairman of the powerful Senate Appropriations Committee.