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CHARLOTTE, NC - SEPTEMBER 04:  Illinois nominee for Congress Tammy Duckworth leaves the stage after speaking during day one of the Democratic National Convention at Time Warner Cable Arena on September 4, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate.  (Photo by Alex Wong/Getty Images)
CHARLOTTE, NC - SEPTEMBER 04:  Illinois nominee for Congress Tammy Duckworth leaves the stage after speaking during day one of the Democratic National Convention at Time Warner Cable Arena on September 4, 2012 in Charlotte, North Carolina. The DNC that will run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate.  (Photo by Alex Wong/Getty Images)

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Sen. Tammy Duckworth is expecting

Sen. Tammy Duckworth (D-IL) is pregnant and will make history when she becomes the first sitting senator in history to give birth.

Sen. Tammy Duckworth is expecting

Sen. Tammy Duckworth (D-IL) is pregnant and will make history when she becomes the first sitting senator in history to give birth.