WASHINGTON (AP) — Raising the stakes in an East-West showdown over Ukraine, President Barack Obama on Thursday ordered economic sanctions against nearly two dozen members of Vladimir Putin’s inner circle and a major Russian bank that provides them support. He warned that more sweeping penalties against Russia’s robust energy sector could follow.

Russia retaliated swiftly, imposing entry bans on American lawmakers and senior White House officials, among them Senate Majority Leader Harry Reid, D-Nev., House Speaker John Boehner, R-Ohio, Obama senior adviser Dan Pfeiffer and the president’s deputy national security adviser, Ben Rhodes.