His cameo on the show will highlight a backlog of rape kits.
In The Know
Gingrich had been on Donald Trump's vice presidential shortlist.
"The Today Show" host suggested the daughters sit down and discuss the tone of the campaigns.
Duckworth is slated to speak in the early evening at the Democratic convention.
They want to boycott Bradley Cooper.
Perry will perform just ahead of Chelsea Clinton's Thursday speech.
CBS was hit with a cease and desist after the comedian resurrected his iconic character.
"This has really been weighing on me," he said.
Scarborough said President Obama "channeled Ronald Reagan."
More than a dozen celebs sang the song after former Rep. Gabby Giffords spoke.