"The authority exists to apply sanctions to a variety of individuals and entities," White House press secretary Jay Carney told reporters. "We're not going to rule out individuals or rule out actions."
Putin himself was not named among the group of 11 Russian and Ukrainian officials, including several of his aides, who were slapped with sanctions on Monday for Russia's military incursion in Ukraine's Crimea region. A senior U.S. official said it would have been a highly unusual and extraordinary step to target a head of state.
"The people around him... have a great deal of influence in Russia and the actions of the Russian government," Carney said.