Quote from the article:

He would be among the richest presidents in American history if elected — probably in the top four.

He couldn’t top George Washington who, with nearly 60,000 acres and more than 300 slaves, is considered the big daddy of presidential wealth. After that, it gets complicated, depending how you rate Thomas Jefferson’s plantation, Herbert Hoover’s millions from mining or John F. Kennedy’s share of the vast family fortune, as well as the finer points of factors like inflation adjustment.

It very obviously does mention the Kennedy family fortune, and it does point out that it might be comparable to Romney’s wealth.

How did the Associated Press’s “angry left” overlords let that slip in there?