Russian hackers behind the damaging cyber intrusion of the State Department in recent months used that perch to penetrate sensitive parts of the White House computer system, according to U.S. officials briefed on the investigation.
The U.S. waits to hear a reaction from Moscow as new tougher sanctions go into effect. Tracie Potts reports.
President Barack Obama praised the European Union Tuesday for imposing tough new sanctions on Russia and announced additional U.S. sanctions on the country's defense, energy and financial sectors.
Ukrainian separatists hand over bodies of Malaysia Airlines passengers as EU considers sanctions against Russia. Steve Handelsman reports.
President Obama calls for pro-Russia Ukrainian separatists to open site of Malaysia Airlines crash. Steve Handelsman reports.
Intercepted phone calls purportedly between Russian military intelligence officers and members of a pro-Russian separatist group that appear to capture the moment the rebels realized the plane they shot down was a civilian passenger plane could be the smoking gun that helps prove Malaysia Airlines Flight 17 was downed Ukraine by the insurgents.
President Barack Obama said Friday that at least one American citizen was killed in the crash of a Malaysian Airlines passenger jet near the border of Ukraine and Russia.
President Obama is trying to use U.S. influence to calm to areas of conflict. Brian Mooar reports.
Congress considers bill offering aid to Ukraine.
New U.S. intelligence assessments say there are more indications than ever that Russia could invade eastern Ukraine, as congressional lawmakers reacted with alarm to Vladimir Putin's rapidly expanding military buildup along the border.
President Barack Obama says that Russia is a "regional power," rather than the top geopolitical enemy of the United States.
The U.S. and its allies announced Monday that they would, for now, exclude Russia from the G8 and boycott a planned summit in Sochi in retaliation over its Crimea takeover.
President Obama announced Thursday that he is imposing sanctions on additional senior Russian officials and others over the country's annexation of Crimea.
Russia reportedly is prepared to change its stand on Iran nuclear talks in a high-stakes gamble to counter expanded sanctions by the United States and the European Union over Crimea.
Russian President Putin claims Crimea is now part of Russia. Signs treaty to take over country.
Russian President Vladimir Putin signed a decree on Monday recognizing Ukraine's Crimea region as a sovereign state.
President Barack Obama said Monday that new sanctions on Russian officials will "continue to increase the costs" on its government and that the United States is prepared to impose further sanctions if needed.
After Crimeans voted overwhelmingly to join Russia, many are left wondering what is next.
Secretary of State John Kerry meets with Russian Foreign Minister Sergey Lavrov to discuss the ongoing crisis in Ukraine.
The new Ukranian Prime Minister makes the rounds on Capitol Hill as some lawmakers head to the Ukraine to strenthen ties with the new government.