The New York Times:
Mr. Christie’s star has faded as a potential vice-presidential pick. As polls show that his bluntness is striking more voters as bullying, Republicans close to Mr. Romney’s campaign say that the governor’s continued hostile encounters — including one on the Jersey Shore this month that was caught on video — have augmented fears that he is too unpredictable and too contentious, turning what was once viewed as a key strength into a drawback.
A decision to pass on Mr. Christie would highlight the more cautious approach Mr. Romney appears to be taking — by all indications he has been leaning toward measured personalities like Tim Pawlenty, the former Minnesota governor, or Senator Rob Portman of Ohio. This may reflect the lessons of the last presidential race, when a Republican running mate who seemed authentic and exciting went rogue.
(...) Aides and advisers to Mr. Romney, who acknowledge that he was never going to be the safest choice, privately say that they are troubled by Mr. Christie’s temper, calling it unsettling and out of step with Mr. Romney’s temperament. (Indeed, some took it as a clear sign that he will not be picked when Ann Romney said in an interview that she expected her famously button-down husband to select a running mate with the “same personality type.”)