Three of the 17 GOP candidates, including poll leader Donald Trump, are not participating.
Clinton is viewed unfavorably by 48 percent; favorably by 37 percent.
Nationally, Trump is almost 10 points ahead.
There's something "transformational" about being a grandmother, Clinton says.
Peter Sullivan 08/03/15 04:12 PM EDT
The presidential candidate cited the recent controversial videos.
An article raised questions about Graham's military service.
The Democratic 2016 front-runner assaild her rivals' push to defund Planned Parenthood.
Bush talked about his weight loss in an interview at an Iowa Dairy Queen.
The billionaire businessman leads Jeb Bush 26 percent to 12 percent.
The presidential candidate shows off the method in a new video.