[homoe]

Marco Rubio and Dan Sullivan were each trying to honor Mr. Lewis on social media when they mistakenly posted photos of Mr. Cummings, a Black congressman who died in October.

“It was an honor to know & be blessed with the opportunity to serve in Congress with John Lewis a genuine & historic American hero,” Mr. Rubio said in a tweet last Saturday afternoon. “May the Lord grant him eternal peace.”

Except the photo Mr. Rubio posted was not of Mr. Lewis, but of another congressman: Representative Elijah E. Cummings, who died in October. Mr. Rubio also used the photo of himself with Mr. Cummings as his Twitter profile picture for a brief time.

Mr. Sullivan, Republican of Alaska, also memorialized Mr. Lewis with a photo of Mr. Cummings. In the picture he posted to his Facebook account, Mr. Sullivan is standing beside Mr. Cummings in front of the National Museum of African American History and Culture in Washington.

“Congressman Lewis’ courage and principled leadership helped guide America through one of the most challenging periods in its history, calling our country to live up to its ideals with justice and equality for all people regardless of color and creed,” Mr. Sullivan wrote.