"It had to be something like that, that would just be a quick end. And maybe that's not the worst way to go," the president said.

The South Carolina senator’s office said the 71-year-old died after a “brief and sudden illness.”

The sparse statement by Graham’s office, which did not explain his death, comes during a stretch of concern about a lack of transparency about lawmakers’ health.

Graham was set to appear on NBC’s Meet the Press to discuss the collapse of the Iran ceasefire