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Sen. Tammy Duckworth will be the first sitting senator to give birth in U.S. history, according to the Chicago Sun-Times.
"I am proud to have her as my Illinois colleague and prouder still that she will make history by being the first U.S. Senator to have a baby while in office. I couldn't be happier for her."— Sen. Dick Durbin
There have been 10 sitting members of Congress to give birth. Three of them went on to be elected to the Senate.