While pledging that the administration would penalize Moscow for opening a new front against Ukrainian forces, Obama ruled out
"We are not taking military action to solve the Ukrainian problem," he said. "It is very important to understand that a military solution to this problem is not going to be forthcoming."
Obama, who authorized military strikes in Iraq against the militant group
"We don't have a strategy yet," he said in an appearance in the
That remark quickly drew criticism, and White House aides tried to clarify the comment, saying the president was referring only to one aspect of the strategy to take on the militants.
"Other parts of the president's statement explicitly discussed the strategy against ISIL," a White House official said, using one of the acronyms for the militant group.
"He's just saying he hasn't decided to take military action yet, which is what we've been saying for days," added the aide, who requested anonymity in discussing the president's remarks.
On Ukraine, where Russia moved more than 1,000 troops this week, Obama signaled that he would continue along his path of cooperating with Europe to gradually impose tougher sanctions.
He didn't specify what new economic penalties he was considering, but said the possibilities would be discussed next week with European leaders during his trip to a
"My expectation is that we will take additional steps … primarily because we have not seen any meaningful action on the part of Russia to actually try to resolve this in diplomatic fashion," he said.
The troop movements drew harsh condemnations from NATO and European government officials. Both British Prime Minister
Obama rejected the description of the Russian move as an "invasion," saying that it was instead "a continuation of what's been taking place for months now."
The president apparently preferred to avoid the term, analysts said, because it suggests a violation of international rules that requires a response.
The U.S. envoy to the
Obama acknowledged that the separatists in eastern Ukraine were trained, armed and funded by Russia.
But he said that his goal was to apply increasing economic pressure on Russia in hopes that damaging its economy and isolating the country will force President
The latest "incursion into Ukraine will only bring more costs and consequences for Russia," Obama said.
He said he hoped that Europe, which has stronger economic ties to Russia, will agree to take part in increasing the economic pressure on the country.
He said he had spoken with German Chancellor
The United States has an "unwavering commitment" to embattled Ukraine, Obama said.
But he also said that commitment had limits, noting that Ukraine is not a member of the NATO military alliance, in which an attack on one member is considered an attack on all.
Defense officials have been providing nonlethal aid to Ukraine, such as medical products, night-vision goggles and armored vests, and they are considering military training. That kind of assistance, and financial aid, will continue, U.S. officials said.
U.S. and European sanctions have already hit Russia hard, and they could be made more painful with more penalties for banks, and possibly for other sectors, such as transportation and mining.
Cliff Kupchan, an analyst with the Eurasia Group, said he believed the administration would be turning to the kind of harsh penalties it has imposed on Iran, which have largely cut off the country from much of world trade.
"I would expect them to start getting out the Iran playbook," predicted Kupchan, a former
The new Russian move into Ukraine brought pressure from some U.S. lawmakers for Obama to increase sanctions and intelligence sharing with Ukraine, and to begin to provide lethal aid as well.
Sen. Marco Rubio (R-Fla.) repeated his call for arms and "broad sectoral sanctions" against Russia. "The time for hollow rhetoric from Washington and European capitals passed long ago," he said.