William Cummings

USA TODAY

The normally composed Ivanka Trump flashed some of her father's impatience for impertinent questioning from reporters during a phone interview with Cosmopolitan Wednesday morning.

The 34-year-old mother of three and executive in the Trump Organization ended the interview after tough questions about her father's recently announced plan to help working mothers. She accused the interviewer, Prachi Gupta, of "a lot of negativity" in her questions.

"I don't know how useful it is to spend too much time with you on this if you're going to make a comment like that," Ivanka Trump said after a question that centered on her father's 2004 statement that pregnancy is "an inconvenience for a business."

"My father obviously has a track record of decades of employing women at every level of his company, and supporting women, and supporting them in their professional capacity, and enabling them to thrive outside of the office and within," Trump said. "To imply otherwise is an unfair characterization of his track record and his support of professional women."

"I would like to say that I'm sorry the questions — you’re finding them negative, but it is relevant that a presidential candidate made those comments, so I'm just following up," Gupta said.

"Well, you said he made those comments," Ivanka Trump replied. "I don't know that he said those comments."

Gupta assured Trump that she was not making the comments up. Donald Trump did say in 2004 that pregnancy is "a wonderful thing for the woman, it's a wonderful thing for the husband, it's certainly an inconvenience for a business. And whether people want to say that or not, the fact is it is an inconvenience for a person that is running a business."

"There's plenty of time for you to editorialize around this, but I think he put forth a really incredible plan that has pushed the boundaries of what anyone else is talking about," Ivanka Trump said. " I hope that, regardless of what your political viewpoint is, this should be celebrated."

Gupta asked how the GOP nominee planned to pay for his child care proposal. Ivanka Trump explained that all would be revealed in her father's tax-reform plan, and assured Gupta the plan "is budget-neutral."

"I'm going to jump off, I have to run," Ivanka Trump abruptly stated. "I apologize."

Ivanka Trump has been at the center of the campaign's efforts to improve Donald Trump's image among female voters. She has been closely tied to his child care proposal. Ivanka Trump gave a speech on the issue at the Republican National Convention and introduced her father before he unveiled his plan on Tuesday.

Trump unveils child care financing plan in pitch to suburban women