President Trump sent 17 nominations to the Senate for confirmation on Thursday, according to the White House. But the FBI director nominee, Christopher Wray, was not among them, raising questions about why the administration has not yet made the nomination official.

Trump announced his intention to name Wray, a former assistant attorney general, to the FBI's top job in a June 7 tweet. However, White House deputy press secretary Sarah Sanders was unable to explain on Thursday why Wray's nomination has not yet moved forward.

"There's a pretty lengthy paperwork process, I know, that goes with selecting that individual," Sanders told reporters at the White House. "And so I believe they're in the middle of that process. And as soon as it's completed, it will be sent over."

Sanders specified that Trump was "certainly not too early" with his announcement of Wray's selection.

Among the nominations sent to the Senate on Thursday was that of K.T. McFarland for ambassador to Singapore. McFarland is presently Trump's deputy national security adviser, but officials indicated in early April that she would exit the White House to take the diplomatic post shortly after Trump named H.R. McMaster as his new national security adviser.

Her nomination took more than two months to become official.

The White House also sent paperwork for Eric Ueland, a former congressional staffer and transition official, to become undersecretary for management at the State Department.