SEOUL, South Korea (AP) -- President Barack Obama told Russia's leader Monday that he would have more flexibility after the November election to deal with the contentious issue of missile defense, a candid assessment of political reality that was picked up by a microphone without either leader apparently knowing.
"This is my last election," Obama is heard telling outgoing Russian President Dmitry Medvedev. "After my election I have more flexibility."
Medvedev replied, according to a tape by ABC News: "I understand. I will transmit this information to Vladimir," an apparent reference to incoming President Vladmir Putin.
Obama and Medvedev did not intend for their comments, made during a meeting in Seoul, South Korea, to be made public.
Once they were, the White House said Obama's words reflected the reality that domestic political concerns in the both the U.S. and Russia this year would make it difficult to fully address their long-standing differences over the contentious issue of missile defense.
Obama, should he win re-election, would not have to face voters again.
"Since 2012 is an election year in both countries, with an election and leadership transition in Russia and an election in the United States, it is clearly not a year in which we are going to achieve a breakthrough," White House deputy national security adviser Ben Rhodes said.
Tensions over missile defense have threatened to upend the overall thawing of relations between the U.S. and Russia in recent years.
Both leaders acknowledged as much in their public statements to reporters following their meeting. Obama said there was "more work to do" to bridge their differences; Medvedev said each country had their own positions on missile defense, but there was still time to find a solution.
Obama's remarks had immediate repercussions back home.
Rep. Mike Turner of Ohio, Republican chairman of the House Armed Services Subcommittee on Strategic Forces, wrote to the president requesting an "urgent explanation of (his) comments to President Medvedev in Seoul this morning."
"Congress has made exquisitely clear to your administration and to other nations that it will block all attempts to weaken U.S. missile defenses," Turner said. "As the chairman of the Strategic Forces Subcommittee, which authorizes U.S. missile defense and nuclear weapons policy, I want to make perfectly clear that my colleagues and I will not allow any attempts to trade missile defense of the United States to Russia or any other country."
Congress included in the fiscal 2012 defense authorization act language constraining Obama's ability to share classified U.S. missile defense information with Russia. Obama signed that legislation into law.
Russia has been strongly critical of plans for U.S.-led NATO missile defense in Europe. Russian officials believe the planned missile shield would target Russia's nuclear deterrent and undermine global stability, while the U.S. insists the planned missile shield is intended to counter threats from Iran.
Putin said earlier this month that Washington's refusal to offer Moscow written guarantees that its missile defense system would not be aimed against Russia deepened its concerns.
Putin won elections held earlier this year and will return to the presidency later this spring. He is expected to name Medvedev prime minister.
The U.S. and Russia have also clashed recently over their approach to dealing with violence in Syria. The U.S. has sharply criticized Russia for opposing U.N. Security Council action calling on Syria's president to leave power.
Obama said Monday that despite past differences on Syria, he and Medvedev agreed they both support U.N. envoy Kofi Annan's efforts to end the violence in Syria and move the country towards a "legitimate" government.