Can Hillary Make History?

Larry J. Sabato and associates at the University of Virginia write some statistical wisdom for Politico.

No retiring president below 50 percent job approval nationally has passed the White House to his party’s nominee in the 75 years of the polling era. Obama’s approval rating, as of this writing, is around 45 percent (give or take), and his disapproval is about 50 percent.

A percentage player therefore would bet against the Democratic nominee. Admittedly, Sabato's sample size is small.