republicans over benghazi. >> with all due respect, the fact is, we had four dead americans. was it because of a protest, or was it because of guys out for a walk one night who despicided to kill some americans? what difference at this point does it make? it's our job to figure out what happened and do everything we can to prevent it from ever happening again, senator. >> even her former rivals admired her endurance. >> and no matter how daunting the odds, no matter how much people try to knock her down, she never, ever quits. >> reporter: but the flip side of that resilience is a certain amount of defensiveness. nearly 20 years ago, she had this to say about the republicans. >> the great story here is this vast, right-wing conspiracy that has been conspiring against my husband since the day he announced for president. >> reporter: more recently on "60 minutes," she insisted she's held to a higher standard. >> i often feel like there's a hillary standard and there's the standard for...

republicans over benghazi. >> with all due respect, the fact is, we had four dead americans. was it because of a protest, or was it because of guys out for a walk one night who despicided to kill some americans? what difference at this point does it make? it's our job to figure out what happened and do everything we can to prevent it from ever happening again, senator. >> even her former rivals admired her endurance. >> and no matter how daunting the odds, no matter how much people try to knock her down, she never, ever quits.