Hillary's Achilles' heel: the perception that she lacks likability and warmth

From Newsweek:

Hillary pollster Mark Penn [commenting on the resignation of Hillary's New Hampshire campaign chairman, Bill Shaheen, for dredging up Obama's admitted past drug use:] "It's dangerous for her," says the Democratic strategist. "She has high negatives. She cuts someone else up; she cuts herself down."

There isn't any argument over Hillary's Achilles' heel: the perception that she lacks likability and warmth.