WASHINGTON, Feb 9 (Reuters) - In his first call as president with Russian leader Vladimir Putin, Donald Trump denounced a treaty that caps U.S. and Russian deployment of nuclear warheads as a bad deal for the United States, according to two U.S. officials and one former U.S. official with knowledge of the call.
When Putin raised the possibility of extending the 2010 treaty, known as New START, Trump paused to ask his aides in an aside what the treaty was, these sources said.
Trump then told Putin the treaty was one of several bad deals negotiated by the Obama administration, saying that New START favored Russia. Trump also talked about his own popularity, the sources said.
The White House declined to comment. It referred Reuters to the official White House account issued after the Jan. 28 call, which did not mention the discussion about New START.
It has not been previously reported that Trump had conveyed his doubt about New START to Putin in the hour-long call.
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P362575 05: A class photo with Vladimir Putin, (fourth row, second from left) dated 1966 in St. Petersburg, Russia. (Photo by Laski Diffusion)
368975 01: (AMERICAS ONLY) FILE PHOTO: Russian President Vladimir Putin, right, poses for a photograph in this file photo with his parents Maria and Vladimir Putin in1985 just before his departure to Germany. Putin was sworn in as Russia''s second democratically elected president May 7, 2000, pledging to restore Russia as a great power. (Photo by Laski Diffusion/Newsmakers)
ITAR-TASS: LENINGRAD, USSR. Vladimir Putin seen with his wife Lyudmila and daughter Maria. File photo from family archive was taken in spring 1985. (Photo ITAR-TASS) (Photo by TASS via Getty Images)
St, petersburg mayor anatoly sobchak and austrian chancellor's wife christine vranitzky during a ceremony to name 'austria square' in downtown st, petersburg, austria has pledged to restore the square, future president of russia, vladimir putin, looks on, far left, september 1992. (Photo by: Sovfoto/UIG via Getty Images)
President George Bush meets with President Vladimir Putin at the Catherine Palace in St. Petersburg. Bush was meeting with Putin to thank him for signing the UN resolution demanding disarmament of Iraq. (Photo by ?? Brooks Kraft/CORBIS/Corbis via Getty Images)
KRASNODAR, RUSSIA: Russian acting President Vladimir Putin (L) talks to a boy (R) during his visit to the Children's regional clinic hospital in Krasnodar 11 February 2000. Putin arrived in Krasnodar for a two-day visit to take a part in the All Russia Conference on emergency measures to stabilise and develop the Russian agro-industrial complex. (ELECTRONIC IMAGE) (Photo credit should read SERGEI CHIRIKOV/AFP/Getty Images)
Uzbek president islam karimov helping rf president vladimir putin put on a traditional robe, uzbekistan, december 1999. (Photo by: Sovfoto/UIG via Getty Images)
President George W. Bush and First Lady Laura greet President Vladimir Putin and his wife Lyudmila outside of the Catherine Palace in St. Petersburg. Bush was meeting with Putin to thank him for signing the UN resolution demanding disarmament of Iraq. (Photo by ?? Brooks Kraft/CORBIS/Corbis via Getty Images)
MADRID, SPAIN - JANUARY4: Russian President Vladimir Putin (R) and Spanish Prime Minister Jose Maria Aznar (L) pose with their wives Ludmila Putin (2nd L) and Ana Botella before their lunch at Moncloa Palace June 14. Putin said he had no reason to believe the arrest of media magnate Vladimir Gusinsky was politically motivated but vowed to examine the case, which has stirred stormy protest in Moscow. (Photo credit should read SERGEI KARPUKHIN/AFP/Getty Images)
(GERMANY OUT) Vladimir Putin - Politician, Mayor St. Petersburg, Russia - signs an agreement about the marketing of inventions. Second Mayor and Senator of Economics of Hamburg Hans-Juergen Krupp (right) (Photo by Ambor/ullstein bild via Getty Images)
Moscow, russia, outgoing russian president boris yeltsin (r) shaking hands with russian prime minister and acting president vladimir putin (l) as he leaves moscow's kremlin, the seat of russian power,1999. (Photo by: Sovfoto/UIG via Getty Images)
Russian prime minister vladimir putin seen casting his vote during the elections to the state duma, at the polling station #2026 in moscow's kosygina street,moscow, russia, december 19, 1999. (Photo by: Sovfoto/UIG via Getty Images)
N362234 01: (FILE PHOTO) Russian Prime Minister Vladimir Putin visits Uzbekistan President Islam Karimov on August 16, 1999. President Boris Yeltsin announced on national television Friday, Dec. 31, 1999 that he had resigned and presidential elections will be held within 90 days to replace him. Yeltsin said he was stepping down immediately because he wanted Putin to succeed him. Putin, the country's most popular politician, immediately took control of the government and will serve as acting president until the elections. (photo by Laski Diffusion/Liaison Agency)
SEVEROMORSK, RUSSIA - APRIL 7: Russian President-elect Vladimir Putin watches the tactical exercises of Russia's Northern Fleet in the Barentsevo Sea, 06 April 2000. Vladimir Putin spent the night underwater in a nuclear submarine near the Arctic Circle. (Photo credit should read AFP/AFP/Getty Images)
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New START gives both countries until February 2018 to reduce their deployed strategic nuclear warheads to no more than 1,550, the lowest level in decades. It also limits deployed land- and submarine-based missiles and nuclear-capable bombers.
During a debate in the 2016 presidential election, Trump said Russia had "outsmarted" the United States with the treaty, which he called "START-Up." He asserted incorrectly then that it had allowed Russia to continue to produce nuclear warheads while the United States could not.
Secretary of State Rex Tillerson said he supported the treaty during his Senate confirmation hearings.
During the hearings Tillerson said it was important for the United States to "stay engaged with Russia, hold them accountable to commitments made under the New START and also ensure our accountability as well."
Two of the people who described the conversation were briefed by current administration officials who read detailed notes taken during the call. One of the two was shown portions of the notes. A third source was also briefed on the call.
Reuters has not reviewed the notes taken of the call, which are classified.
The Kremlin did not immediately respond to requests for comment.
CONCERNS OVER PHONE CALLS
The phone call with Putin has added to concerns that Trump is not adequately prepared for discussions with foreign leaders.
Typically, before a telephone call with a foreign leader, a president receives a written in-depth briefing paper drafted by National Security Council staff after consultations with the relevant agencies, including the State Department, Pentagon and intelligence agencies, two former senior officials said.
Just before the call, the president also usually receives an oral "pre-briefing" from his national security adviser and top subject-matter aide, they said.
Trump did not receive a briefing from Russia experts with the NSC and intelligence agencies before the Putin call, two of the sources said. Reuters was unable to determine if Trump received a briefing from his national security adviser Michael Flynn.
In the phone call, the Russian leader raised the possibility of reviving talks on a range of disputes and suggested extending New START, the sources said.
New START can be extended for another five years, beyond 2021, by mutual agreement. Unless they agree to do that or negotiate new cuts, the world's two biggest nuclear powers would be freed from the treaty's limits, potentially setting the stage for a new arms race.
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New START was ratified by the U.S. Senate in December 2010 by a vote of 71 to 26. Thirteen Republican senators joined all of the Senate's Democrats in voting for the treaty, although Republican opponents derided it as naive.
The call with Putin was one of several with foreign leaders where Trump has turned to denounce deals negotiated by previous administrations on trade, acceptance of refugees and arms control.
In a phone call with Australian Prime Minister Malcolm Turnbull, Trump questioned an agreement reached by the Obama administration to accept 1,250 refugees now being held by Australia in offshore detention centers.