Cecile Richards said healthcare "for an entire generation is at stake."
Donald Trump is needling the Democratic front-runner on women’s rights.
"No one had been able to carry that off," he added of countering the Clintons.
The group responded after Rubio attacked its federal funding.
The former president is visiting Cedar Rapids and Dubuque on Thursday.
Bush said Obama and Hillary Clinton have a "gun-grabbing agenda."
Gowdy said any Republican — including Donald Trump — is better than a Democrat.
Kelly also revealed Trump repeatedly treated her warmly before formally launching his bid.
"A lot of things happened that were very seedy," Trump added of Bill Clinton's presidency.
The Democratic front-runner is likely beating the benchmark as 2016 begins.
Trump called Sam Nunberg "a desperate person" and "a highly self-destructive individual."
Trump said the New Hampshire Union-Leader is "like a bully that has been knocked out."
"I guess maybe I won't win if that's what it takes," Kasich said.
Trump urged Cruz to go to court to "pre-empt the Dems."
Paul prodded at the controversy over Cruz's citizenship in a radio interview.
Obama’s gun control actions were "50 percent stunt,” Rep. Darrell Issa said.
Cruz's slim 2-point lead over Trump is within the poll's margin of error.
"What others do will not affect my decision-making process," Mitt Romney's son added.
"He does not need the notoriety," Cain added of Trump's 2016 run.
Rubio also said that Hillary Clinton is "incompetent" and "a liar."
Carson added that there is "no doubt" Hillary Clinton also knew of the NSA spying.
"They should both try showing up for work," Paul said of his 2016 GOP presidential rivals.
Trump said his own marital history is fair game.
Bush's new ad says Trump was "unhinged, liberal [and] dishonest" 2015.