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.
RELATED: Vladimir Putin throughout the years
Vladimir Putin through the years
Vladimir Putin through the years
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)
Discover More Like This
BACK TO SLIDE
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.
RELATED: President Trump settles into his new life as president
President Trump settles into his new life as president
President Trump settles into his new life as president
Canadian Prime Minister Justin Trudeau (R) is greeted by U.S. President Donald Trump prior to holdiing talks at the White House in Washington, U.S., February 13, 2017. REUTERS/Carlos Barria (
Japanese Prime Minister Shinzo Abe (L) and U.S. President Donald Trump (2nd L) are seen at Trump International Golf club in West Palm Beach, Florida, U.S., February 11, 2017. Picture taken February 11, 2017. Cabinet Public Relations Office/Handout via Reuters ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.
U.S. President Donald Trump, First Lady Melania Trump (R), Japanese Prime Minister Shinzo Abe and his wife Akie Abe (L) pose for a photograph before attending dinner at Mar-a-Lago Club in Palm Beach, Florida, U.S., February 11, 2017. REUTERS/Carlos Barria
Japanese Prime Minister Shinzo Abe and Akie Abe (R) attend dinner with U.S. President Donald Trump his wife Melania (L) at Mar-a-Lago Club in Palm Beach, Florida U.S., February 10, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump holds his earpiece as he holds a joint press conference with Japanese Prime Minister Shinzo Abe (not pictured) at the White House in Washington, U.S., February 10, 2017. REUTERS/Jim Bourg
U.S. President Donald Trump watches as Vice President Mike Pence (R) swears in Jeff Sessions (L) as U.S. Attorney General while his wife Mary Sessions holds the Bible in the Oval Office of the White House in Washington February 9, 2017. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY
U.S. President Donald Trump and First Lady Melania Trump greet a marching band as they arrive at Trump International Golf club to watch the Super Bowl LI between New England Patriots and Atlanta Falcons in West Palm Beach, Florida, U.S., February 5, 2017. REUTERS/Carlos Barria
US President Donald Trump watches the Super Bowl with First Lady Melania Trump (R) and White House Chief of Staff Reince Priebus (L) at Trump International Golf Club Palm Beach in West Palm Beach, Florida on February 5, 2017. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
US President Donald Trump salutes before boarding Air Force One from MacDill Air Force Base on February 6, 2017 in Tampa, Florida.
President Donald Trump on Monday paid his first visit to US Central Command, meeting officers who will form the tip of the spear in implementing his new strategy to defeat the Islamic State group. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
U.S. President Donald Trump and First Lady Melania Trump attend the 60th Annual Red Cross Gala at Mar-a-Lago club in Palm Beach, Florida, U.S., February 4, 2017. REUTERS/Carlos Barria
White House Chief of Staff Reince Priebus (L) listens as U.S. President Donald Trump talks to journalists members of the travel pool on board the Air Force One during his trip to Palm Beach, Florida while flying over South Carolina, U.S., February 3, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump hosts a strategy and policy forum with chief executives of major U.S. companies at the White House in Washington, U.S. February 3, 2017. REUTERS/Kevin Lamarque
U.S. President Donald Trump and Vice President Mike Pence leaves after meeting with Harley Davidson executives at the South Lawn of the White House in Washington U.S., February 2, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump pulls a chair out for Paula White from the New Christian Destiny Center to as they attend a meeting regarding the supreme court nomination at the Roosevelt room of the White House in Washington, U.S., February 1, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump arrives to announce his nomination of Neil Gorsuch for the empty associate justice seat of the U.S. Supreme Court at the White House in Washington, D.C., U.S., January 31, 2017. REUTERS/Carlos Barria
On Friday, February 3, a Marine salutes U.S. President Donald Trump as he boards Marine One on the South Lawn of the White House, en route to Andrews Airforce Base where he will depart for Palm Beach, Florida.. (Photo by Cheriss May/NurPhoto via Getty Images)
US President Donald Trump sits after signing a memorandum about Labor Department's rules on investing in the Oval Office of the White House on February 3, 2017 in Washington, DC. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
WASHINGTON, DC - FEBRUARY 03: U.S. President Donald Trump delivers opening remarks at the beginning of a policy forum with (L-R) daughter Ivanka Trump, Global Infrastructure Partners Chairman Adebayo Ogunlesi, IBM CEO Ginni Rometty, PepsiCo CEO Indra Nooyi, Blackstone Group Chairman and CEO Stephen Schwarzman and other business leaders in the State Dining Room at the White House February 3, 2017 in Washington, DC. Leaders from the automotive and manufacturing industries, the financial and retail services and other powerful global businesses were invited to the meeting with Trump, his advisors and family. (Photo by Chip Somodevilla/Getty Images)
U.S. President Donald Trump arrives to announce his nomination of Neil Gorsuch for the empty associate justice seat of the U.S. Supreme Court at the White House in Washington, D.C., U.S., January 31, 2017. REUTERS/Carlos Barria TPX IMAGES OF THE DAY
U.S. President Donald Trump signs an executive order cutting regulations, accompanied by small business leaders at the Oval Office of the White House in Washington U.S., January 30, 2017. REUTERS/Carlos Barria
Activists gather outside the White House to protest President Donald Trump's executive actions on immigration in Washington January 29, 2017. REUTERS/Aaron P. Bernstein
WASHINGTON, DC - JANUARY 31: National Security Agency Director Michael Rogers waits for the arrival of U.S. President Donald Trump for a meeting on cyber security in the Roosevelt Room at the White House January 31, 2017 in Washington, DC. Citing the hack of computers at the Democratic National Committee by Russia, Trump said that the private and public sectors must do more to prevent and protect against cyber attacks. (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - FEBRUARY 1: (AFP OUT) President Donald Trump holds an African American History Month listening session attended by nominee to lead the Department of Housing and Urban Development (HUD) Ben Carson (R), Director of Communications for the Office of Public Liaison Omarosa Manigault (L) and other officials in the Roosevelt Room of the White House on February 1, 2017 in Washington, DC. (Photo by Michael Reynolds - Pool/Getty Images)
U.S. President Donald Trump gives a thumbs-up to reporters as he waits to speak by phone with the Saudi Arabia's King Salman in the Oval Office at the White House in Washington, U.S. January 29, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump walks from the Oval Office to Marine One upon his departure from the White House in Washington January 26, 2017. REUTERS/Kevin Lamarque
The Marine One helicopter transporting U.S. President Donald Trump is seen as it departs from the South Lawn of the White House in Washington, U.S., for a trip to Philadelphia, January 26, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump holds an executive order dealing with members of the administration lobbying foreign governments, after signing it in the Oval Office at the White House in Washington, U.S. January 28, 2017. REUTERS/Jonathan Ernst
British Prime Minister Theresa May looks on as U.S. President Donald Trump speaks during their joint news conference at the White House in Washington, U.S., January 27, 2017. REUTERS/Carlos Barria
Members of a ceremonial guard carry flags prior to the arrival of British Prime Theresa May at the White House in Washington, U.S., January 27, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump (R) and Vice President Mike Pence return to the White House after a visit to Homeland Security headquarters in Washington, U.S., January 25, 2017. REUTERS/Jonathan Ernst
U.S. President Donald Trump holds up a signed executive order to advance construction of the Keystone XL pipeline at the White House in Washington January 24, 2017. REUTERS/Kevin Lamarque TPX IMAGES OF THE DAY
Turkey's President Recep Tayyip Erdogan (R) and British Prime Minister Theresa May arrive to speak after their meeting at the presidential complex in Ankara on January 28, 2017.
British Prime Minister Theresa May on January 28 promised steps to ramp up trade between Turkey and Britain ahead of Brexit but also urged Ankara to uphold human rights following a failed coup. On her first visit to Turkey as premier and fresh from meeting new US President Donald Trump at the White House, May held three hours of talks with President Recep Tayyip Erdogan.
/ AFP / Adem ALTAN (Photo credit should read ADEM ALTAN/AFP/Getty Images)
WASHINGTON, DC - JANUARY 27: British Prime Minister Theresa May looks on as U.S. President Donald Trump speaks in The Oval Office at The White House on January 27, 2017 in Washington, DC. British Prime Minister Theresa May is on a two-day visit to the United States and will be the first world leader to meet with President Donald Trump. (Photo by Christopher Furlong/Getty Images)
Members of the Trump administration walk through the colonnade of the White House on January 27, 2017 in Washington, DC. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Discover More Like This
BACK TO SLIDE
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.