The U.S. and Europe on Monday would then unite to impose sanctions on Russia, Kerry told a Senate Appropriations subcommittee Thursday during a hearing on the State Department's budget.
“There will be a response of some kind to the referendum itself,” Kerry said. “If there is no sign [from Russia] of any capacity to respond to this issue ... there will be a very serious series of steps on Monday.”
“Our hope is to have Russia join in respecting international law. ... There is no justification, no legality to this referendum that is taking place,” he said. “The hope is that reason will prevail but there is no guarantee of that.”
Sen. Lindsey Graham, a South Carolina Republican and a top critic of President Obama's foreign policy, asked what the administration would do if Russian forces advance farther into the eastern area of Ukraine, and the new government in Kiev asks the U.S. for weapons to fight the Russians.
Kerry responded carefully, saying “we have contingencies – we are talking through various options that may or may not be available.”