President Donald Trump has left for his first overseas trip since taking office without appointing a new director for the FBI.

Trump boarded Air Force One bound for Saudi Arabia Friday. He left behind a whirlwind week in Washington involving investigations into his ties with Russia and controversy surrounding his firing of FBI Director James Comey.

Deputy Attorney General Rod Rosenstein briefed House members Friday about the situation. But his comments fell short for some members of Congress.

“He was explicitly nonresponsive except with whatever implication there is from the phrase 'A decision is not final until it's final,'” said California Rep. Brad Sherman.

Former Connecticut Sen. Joe Lieberman is considered a front-runner for the position. But New Jersey Sen. Cory Booker said Friday that Lieberman would not have his support.

“I think it would be a big mistake to nominate Joe Lieberman,” Booker said. “I’ve known Joe for years… This is not the time to put a politician or political person in charge of the FBI.”

Rosenstein said that he was not aware of any request by the former FBI director for more resources to investigate possible links between Russia and the Trump campaign.

Comey agreed Friday evening to testify before the Senate Intelligence Committee after Memorial Day regarding the Russia investigation.

The Trump administration announced that it would put off appointing a new FBI director until after Trump returns from his nine-day trip to the Middle East and Europe.