When sexually explicit emails first surfaced between Brett McGurk, the Obama administration's nominee to be the ambassador to Iraq, and a Wall Street Journal reporter who later became McGurk's wife, the State Department refused to comment.

But now spokesperson Victoria Nuland is making it clear the State Department is sticking by it's choice.

Nuland defended the nomination of McGurk calling him "uniquely qualified" for the position.

"He spent the better part of the last decade serving our country in and out of Iraq, working for a Republican administration, a Democratic administration," she told reporters. "He is in our view uniquely qualified to serve as the ambassador and we urge the Senate to act quickly on his nomination," she said.

Nuland would not comment directly on the explicit nature of the emails, some of which included references to masturbation. The email exchanges were sentto Gina Chon in 2008 when McGurk was working in Iraq negotiating sensitive diplomatic issues such as the eventual withdrawal of U.S. troops. Chon was covering Iraq for the Journal. At the time McGurk was married. The blog Cryptome published their racy correspondence earlier this week. ABC News has confirmed the authenticity of the emails.

Senate sources tell ABC News that they have questions over whether McGurk was offering access to information and power, even jokingly, to Chon as part of their blooming relationship. For example in one email Chon jokingly refers to reporters as vultures attacking sources, to which he replies, "If treated to many glasses of wine - you could be the chosen vulture."

McGurk also talks about bringing the reporter with him to dinner with a leading Iraqi politician. He ultimately does not, but writes later, "I had a very good day with the Iraqi's… the best yet. Can't tell you about it of course. But you should definitely stay past Sunday," he writes.

McGurk and Chon are now married, a point Nuland made to reporters saying that she had no comment on the emails except that "they are out there for everyone to see between him and the woman who subsequently became his wife."

As to whether McGurk was properly vetted, Nuland maintained that "all of the necessary things were done before his nomination" and managed with the exact same process the administration uses for all nominations.

Nuland would not comment specifically about Republican Senate criticism of the emails and McGurk's nomination, but confirmed that the department is continuing to work with members of Congress over McGurk's nomination process, "in support of it as we do on all nominees."