US President Barack Obama voiced doubt on Tuesday on the prospects for progress with Moscow on missile defense until after the November US election as he staunchly defended remarks caught on camera the day before with Russian President Dmitry Medvedev.

Obama was overheard assuring Medvedev on Monday that he would have "more flexibility" to deal with contentious arms-control issues after the Nov 6 presidential ballot, drawing sharp criticism back home from his Republican foes.

Speaking on the sidelines of a global nuclear security summit in Seoul, Obama sought to put the controversy to rest but made clear that his earlier comments reflected a political reality that "everybody understands".

"I don't think it's any surprise that you can't start that a few months before presidential and congressional elections in the United States and at a time when they just completed elections in Russia," Obama told reporters with Medvedev at his side.

US plans for an anti-missile shield have bedeviled relations between Washington and Moscow despite Obama's "reset" in ties between the former Cold War foes. Obama's Republican opponents have accused him of being too open to concessions to Russia on the issue.

In Monday's talks, Obama urged Moscow to give him "space" until after the US election, and Medvedev said he would relay the message to incoming Russian president Vladimir Putin, who takes over at the Kremlin in May.

【Obama hits back in Russia 'hot mic' row】相关文章：

★ Nepal pensioner claims to be shortest man

★ Obama vows to pursue nuclear cuts with Russia

★ 7 killed in ambush on Syrian military

★ Australian PM knocks out rival, but not discontent

★ Obama to stress security alliance in Seoul visit

★ Leaders, lawmakers discuss work report

★ British PM under pressure in selling access row

★ Obama downplays use of US drones in Iraq

★ Disney bringing famous character brands to store in China this year

★ Mexican troops find 15 tons of meth