"The rationale for Biden is weakened," Mr. Luntz told Politico. "Absence did not make the heart grow fonder. Democratic voters are no different from Republicans: Everyone wants new voices and fresh ideas. And they believe if the vice president wanted to run for his boss' job, he should have thrown his hat in the ring already."
"Nobody leaves a race because they get tired, or because they think they don't have the votes. They leave the race because they run out of money," said Frank Luntz, a GOP pollster. "Donald Trump will never run out of money, and that makes him incredibly powerful."