Women have played a key role in the Republican Party since its establishment in 1854.
The Republican Party and Republican women were the primary force behind the women's suffrage movement and the passage of the 19th Amendment to the U.S. Constitution.
Republican women have made history as the first women to serve in key positions, including Jeannette Rankin, the first woman elected to the U.S. Congress.
Republican women such as Kirstjen Nielsen (pictured) continue to explore uncharted territory on behalf of all women. In December, Nielsen was sworn-in as Secretary of the U.S. Department of Homeland Security.