"Russia's actions in Ukraine are hurting Russia and the Russian people," he said.
In a formal declaration released by the White House on Monday morning, the G-7 encouraged "all sides" in the Russia-Ukraine conflict to abide by the Minsk agreements, which call for the removal of heavy weaponry from the front lines and a cease-fire. The nations said sanctions on Russia would remain until Russia recognizes Ukraine's sovereignty and abides by the Minsk agreements.
Obama said Monday that the G-7 partners are pursuing a "diplomatic solution" for the Ukraine conflict, but "the G-7 is making it clear, if necessary, we stand ready to impose additional significant sanctions against Russia."
The G-7 also expressed "support" for the U.S. and E.U. nations' ongoing negotiations with Iran to craft a nuclear deal, which has a June 30 deadline and which the G-7 hopes will ensure "the exclusively peaceful nature of Iran's nuclear programme."
Obama also addressed the attack on a U.S. personnel file that looks to have originated from China. Pushing Congress to pass cybersecurity legislation, he partially blamed the breach on old systems, acknowledging that "both state and nonstate actors are sending everything they've got at trying to breach these systems."
"This problem is not going to go away," he said. "It is going to accelerate, and that means that we have to be as nimble, as aggressive, and as well resourced as those trying to break into the system."
Monday's talks, near the German-Austrian border in the town of Kruen, also focused on combating terrorism around the world. Iraqi Prime Minister Haider al-Abadi and Nigerian President Muhammadu Buhari are attending the conclave to discuss the threat of groups such as the Islamic State and Boko Haram. Obama met with al-Abadi earlier Monday and called him a "reliable partner."
Obama said the United States is examining a "range of plans" for how Iraqi forces might better combat the "nimble," "aggressive," and "opportunistic" Islamic State fighters. Two key elements to improving their combat readiness include training Iraqi soldiers faster and finding more recruits.
"Where we've trained Iraqi forces directly and equipped them and we have a train-and-assist posture, they operate effectively," Obama said. "Where we haven't—morale, lack of equipment, etc.—may undermine the effectiveness of Iraqi security forces."
On the Supreme Court's upcoming ruling on the Affordable Care Act in King v. Burwell, Obama reiterated that "there is no reason why the existing exchanges should be overturned through a court case."
"This should be an easy case," he said. "Frankly, it probably shouldn't have even been taken up."
Obama added: "What's more, the thing is working. I mean, part of what's bizarre about this whole thing is we haven't had a lot of conversation about the horrors of Obamacare, because none of them have come to pass."