U.S. officials hope those violations will spur European leaders into expanding the economic sanctions in place against Russia, which have hurt the country's economy but not yet prompted a change in strategy from Putin.
"Russia has not changed its behavior," said Heather Conley, the director of the Europe program at the Center for Strategic and International Studies. "If anything, President Putin I think is doubling down on multiple fronts. And the cohesiveness feels like it's not there."
European leaders -- who also confront economic instability stemming from Greece's debt crisis -- will decide at a separate meeting later this month whether to continue their sanctions on Russia.
"Clearly President Putin's calculus has not fully shifted by any means," said Ben Rhodes, Obama's deputy national security adviser, adding that Western sanctions had delivered a "tremendous hit to the Russian economy.