Beware of this caller!  This sounded like one of those calls that asks you yes/no questions to get you to say "yes," and then scam you into paying for something you did not order.

Continuing daily calls from these idiots.
While I would hate to use that term against a high quality cancer charity, I don't have the slightest idea if this even really IS a legitimate charity at all, or a total scam. And at this point I don't care. Anyone who calls every day, unsolicited, sometimes more than once a day, won't leave a message or send out a letter, trying to get your money, is an idiot. Especially if its a fake robo-recording meant to fool you as other people here claim.
As for the DNC List,  the category of "charity" should not include harassment being allowed.

Very sophisticated robot from United Breast Cancer Foundation. Fascinatingly real sounding older woman voice with realistic responses and high-pressure sales pitch. I am a cancer researcher so was naturally suspicious. This foundation is in the top 50 worst charities list which you can find here: http://www.tampabay.com/americas-worst-charities/. Only around 1 in 20 dollars donated goes to actual recipients, so if you give them $20, $1 might go to someone with breast cancer.

Received call from 636-206-3833 on my home phone.  Caller ID indicates caller is United Breast C.  Did not answer, as number is unknown to me.  Caller hangs up when answering machine comes on.

Called at 8:40 pm and hung up on the answering machine. Again.  "UNITED BREAST C"