Biden's Wife Jill Would Be 'on Board' If the VP Decides to Run for President

But her spokesman says no decision has been made yet.

"Of course Dr. Biden would be on board if her husband decides to run for president, but they haven't made that decision yet," James Gleeson, a spokesman for Dr. Biden, said.

The statement comes in response to an NBC report that Dr. Biden is already "100 percent on-board" with her husband running in 2016. Previous reports had indicated Dr. Biden, a key adviser to the vice president, was hesitant about her husband pursuing a third run for the White House.

Vice President Biden is still weighing whether he and his family have the emotional energy for a presidential bid. In an interview earlier this month, Biden indicated he was unsure whether he could cope with a run following the death of his son Beau.

"Nobody has a right in my view to seek that office unless they're willing to give it 110 percent of who they are," he said. "I'm optimistic, I'm positive about where we're going ... sometimes it just overwhelms you."