Final answer:
Jefferson Davis and Hiram Rhodes Revels both represented Mississippi in the US Congress, but on opposite sides of the political spectrum.
Step-by-step explanation:
The ironic connection between Jefferson Davis and Hiram Rhodes Revels is that they both represented the state of Mississippi in the United States Congress, but on opposite sides of the political spectrum during a critical time in American history. Jefferson Davis was a former Confederate president, while Hiram Rhodes Revels was the first African American senator. Their connection highlights the complex and changing dynamics in the aftermath of the Civil War and Reconstruction era.