The two leaders met in London Wednesday.
While he is popular, American policies are not. He will be hard-pressed to win concessions on his plans for the economy or Afghanistan.
Obama's outreach to Iran lifts hopes that the US and Russia can find more common ground in their bids to get Iran to curtail its nuclear program.
It could be bluffing or it might be payback – Russia says it's 'ready to fly' bombers to Venezuela and Cuba.