The measures deliver on Obama's warning this week that the United States would ratchet up the costs for Russia if President Vladimir Putin moved to annex the breakaway province of Crimea. But they were aimed at forestalling further Russian incursions into eastern Ukraine, after what Obama described as troubling Russian military movements.
In a tit-for-tat response, Moscow banned nine U.S. officials from entering Russia, including Speaker John A. Boehner, the Senate Democratic leader, Harry Reid of Nevada, Sen. John McCain of Arizona, as well as three senior White House officials.
Michael Steel, a spokesman for Boehner, said, "The speaker is proud to be included on a list of those willing to stand against Putin's aggression."
Obama made a statement on the South Lawn of the White House on Thursday before leaving on a trip to Florida.
"The United States is today moving, as we said we would, to impose additional costs on Russia," he said. "These are all choices that the Russian government has made, choices that have been rejected by the international community."
Obama also said he had signed a new executive order that would allow him to impose sanctions on Russian industrial sectors, presumably including its energy exports - a step that would greatly tighten the economic pressure on Russia.
On Monday, the administration announced sanctions against seven Russian officials, including several close advisers to Putin, as well as against separatists figures in Crimea. The executive order signed by Obama laid the legal groundwork to punish Russian companies involved in the arms trade, as well as other officials who work with the Russian government. The administration is now moving on those fronts as well.
The new sanctions, which are coordinated with an expected imposition of new sanctions by the European Union, deepen the confrontation between the West and Russia. But it remains unclear whether any of this will put a brake on Russia, which has moved swiftly since the referendum in Crimea last Sunday to annex the province.