The American president scrambles now to unscramble another "mistake of historic proportions."
The Texas senator called on the U.S. to ship weapons to Ukraine's military.
Lawmakers are pressuring the administration to arm Ukraine.
Vice president accuses Russian leader of "repression" and "contempt."
National Security Strategy sounds cautious note on use of U.S. military power.
"The nature of those arms, I can't say right now," he told senators.
The White House has opposed sending arms to Ukraine.
The $585 billion request would break defense budget caps.
John Kerry and the chairman of Joint Chiefs of Staff are reportedly open to discussions.
We see an actual ominousness rising in Europe.
“We will continue to … ratchet up the pressure on Russia,” he said.
The United States will offer Ukraine up to $2 billion in loan guarantees over the next year.
Germany is pressuring the White House to not provide Kiev with weapons.
“I certainly wouldn’t hold the United States responsible," John Negroponte said.
Subjects could range from ISIS to vaccinations to the 2016 race.
John Kerry is a secretary of State with toughness, experience and resolve.
Before the Obama administration takes this step, it should be able to answer five questions.
Ashton Carter heads for his confirmation hearing before the Armed Services panel.
The White House believes sanctions are hurting Moscow.
A spokesman acknowledged "a wide variety of opinions about" arming Kiev.
Leaders are looking for ways to ratchet up pressure over violence in Ukraine.
A Russian official blames new fighting in Ukraine on Kiev.
"Deterrence has to have meaning," Zbigniew Brzezinski told Congress Wednesday.
Russian citizens will not stand for an economic crisis forever.