President Barack Obama challenged Russian President Vladimir Putin’s defense of his involvement in Ukraine, arguing Tuesday that there is widespread consensus that Russia is violating international law and urging Putin to agree to talks to de-escalate the situation. “There is a strong belief that Russia’s action is violating international law,” Obama said at an elementary school in the District of Columbia after introducing his proposed 2015 budget. “President Putin seems to have a different set of lawyers making a different set of interpretations. I don’t think that’s fooling anybody.”