Schultz told Roberts this morning that Giffords has emphasized a need for balance and stability throughout her career in politics and that concern for ensuring "the safety net wouldn't be lost from our seniors" drove her to the floor that night.
"You know, Arizona has a lot of seniors like South Florida does, and it was just, you know, all the way around, she's a representative and a daughter of Tucson, Ariz., and made a triumphant return yesterday and it was incredible."
When Biden was asked what he spoke with Giffords about, he joked, "She's now a member of the cracked head club like me."
The debt-ceiling bill passed the House 269-161. The Senate will vote on the measure today.
ABC News' John Parkinson contributed to this report.