WASHIGNTON, DC – DECEMBER 14: U.S. President Barack Obama reacts as John Brennan briefs him on the details of the shootings at Sandy Hook Elementary School in Newtown, Conn. on December 14, 2012 in Washington, D.C. The President later said during a TV interview that this was the worst day of his Presidency. Credit: Getty Images

WASHINGTON (AP) — President Barack Obama on Monday will nominate Chuck Hagel as his next defense secretary and counterterrorism adviser John Brennan to lead the Central Intelligence Agency, two potentially controversial picks for his second-term national security team.

Hagel, even before being nominated, has faced tough criticism from congressional Republicans who say the former GOP senator is anti-Israel and soft on Iran. And Brennan, a 25-year CIA veteran, withdrew from consideration for the spy agency’s top job in 2008 amid questions about his connection to enhanced interrogation techniques during the George W. Bush administration.

Administration officials, speaking on condition of anonymity, say Obama will announce both nominations at a White House event Monday afternoon. Along with secretary of state nominee Sen. John Kerry, D-Mass., Hagel and Brennan would play key roles implementing and shaping Obama’s national security priorities in a second term. All three men must be confirmed by the Senate.

Both Hagel and Brennan have close relationships with Obama, who values loyalty in his inner circle. Brennan, as the president’s top counterterrorism adviser, was deeply involved in the planning of the 2011 raid that killed Sept. 11 mastermind Osama bin Laden. And he has led administration efforts to quell the growth of terror organizations in Yemen and elsewhere in the Middle East and North Africa.

Brennan, 57, spent a quarter-century at the CIA. He served as station chief in Saudi Arabia and in a variety of posts, including deputy executive director, during the Bush administration.

His tenure at the agency during Bush’s presidency drew criticism from liberals when Obama considered naming him CIA director after the 2008 election. Brennan denied being involved in the Bush administration’s enhanced interrogation techniques, but still withdrew his name from consideration.

In a letter to Obama at the time, Brennan said he was “a strong opponent of many of the policies of the Bush administration, such as the preemptive war in Iraq and coercive interrogation tactics, to include waterboarding.” Many people consider waterboarding and other harsh interrogation methods to be torture.

White House officials say they don’t expect Brennan to face similar trouble this time around given his four years of service in the Obama administration.

“The issue has been removed from the debate because the president and John Brennan, as his top counterterrorism adviser, brought those techniques to an end,” Rhodes said.

However, Brennan’s nomination will likely put a spotlight on the administration’s controversial drone program. Brennan was the first Obama administration official to publicly acknowledge the highly secretive targeted killing operations.

Brennan has defended the legality of the overseas drone operations and has said they protect American lives and prevent potential terror attacks.

John Brennan, Assistant to US President Barack Obama for Homeland Security and Counterterrorism, speaks about US policy towards Yemen at the Council on Foreign Relations in Washington, DC, August 8, 2012. Credit: AFP/Getty Images

If confirmed, Brennan will succeed David Petraeus, who resigned in November after admitting to an affair with his biographer.

Deputy CIA director Michael Morell has been serving as the agency’s acting director since Petraeus resigned and was considered by Obama for the top job. Rhodes said Morell will attend Monday’s White House event and is expected to stay at the CIA.

Hagel would replace retiring Pentagon chief Leon Panetta at a time when the Defense Department is facing potentially deep budget cuts. Hagel would also be tasked with overseeing the military drawdown in Afghanistan, where the U.S.-led war is scheduled to end in two years.

Hagel is likely to support a more rapid withdrawal of U.S. troops from Afghanistan than some military generals.

Sen. Mitch McConnell, the top Senate Republican, said Sunday he was reserving judgment on whether to support Hagel but predicted the former senator would face serious questions.

Any nominee must have “a full understanding of our close relationship with out Israeli allies, the Iranian threat and the importance of having a robust military,” McConnell said on ABC’s “This Week.”

The second-ranking Senate Republican, John Cornyn of Texas, said in a statement that making Hagel defense secretary would be “the worst possible message we could send to our friend Israel and the rest of our allies in the Middle East.”

Despite the criticism, no Republican lawmakers have threatened to try to block Hagel’s nomination.

Monday’s nominations leave Obama without a woman in line for a top administration post, a fact that has irked some Democratic women. The president will soon name a new treasury secretary, but current White House chief of staff Jack Lew is the front-runner for the post.

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Associated Press writers Robert Burns, Donna Cassata and Matthew Daly contributed to this report.

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