Samantha Power, one of Senator Barack Obama’s senior foreign policy advisers, had to quit Friday after she lost her cool in an interview with a Scottish newspaper and called Senator Hillary Clinton a “monster.”
The campaign apologized for the flap. But Mr. Obama himself seems unsure of how to respond to the trash-and-thrash tactics that helped Senator Clinton defeat him in Ohio and Texas this week.
The anger that caused Ms. Power to blurt out the monster comment is widespread inside the Obama camp. But Senator Obama, for a variety of reasons — some of them self-imposed — is sharply constrained in the way that he can respond to provocations.