WASHINGTON (CNN) — As the Ukrainian military readies for a potential Russian incursion into its Crimea region, Republican lawmakers urged President Barack Obama to take action to prevent the situation from descending into chaos.
In a statement released Saturday, Sen. John McCain, R-Arizona, said he is "deeply concerned" Russia's presence in Ukraine could expand if the President does not outline consequences for President Vladimir Putin's regime.
"President Obama said that Russia would face 'costs' if it intervened militarily in Ukraine," McCain said. "It is now essential for the President to articulate exactly what those costs will be and to take steps urgently to impose them."
In a brief statement Friday, the President affirmed the United States would stand with Ukraine in the face of Russia's advance.
Obama warned that any violation of Ukraine's sovereignty "would be deeply destabilizing" and "not in the interest of Ukraine, Russia or Europe." But the President failed to spell out the specifics of what a response to the burgeoning crisis would look like.
The need for a response looms large as Putin requested and received unanimous approval from Russia's upper house of Parliament to send Russian military forces into Crimea to normalize the political situation there.
Putin cited the "extraordinary situation in Ukraine" in making his request, adding that the lives of Russian citizens and military personnel had been threatened.
Despite a flurry of activity Saturday in Washington, including a confab of the President's national security team -- Secretary of State John Kerry, Defense Secretary Chuck Hagel, Director of National Intelligence James Clapper, Joint Chiefs Chairman Martin Dempsey and CIA Director John Brennan to discuss potential policy option -- the White House remained mum on how the United States intended to respond to the situation.
A senior administration official says that President Obama was not at the meeting but has been briefed on the latest developments in Ukraine by National Security Adviser Susan Rice.
A member of the Senate Armed Services and Senate Foreign Relations Committee, McCain called Russia's actions an "ongoing military intervention" that would only worsen in severity so long as the President and the international community sit on the sidelines.
"Every moment the United States and our allies fail to respond sends the signal to President Putin that he can be even more ambitious and aggressive in his military intervention in Ukraine," McCain said.
McCain, the President's former Republican rival in the 2008 presidential election, has routinely criticized the Obama administration's foreign policy, painting the White House as rudderless in their dealings with other nations.
In a February interview with a Phoenix radio station, the Arizona senator branded Obama as "the most naive president in history," sentiments he echoed Saturday.
"None of us should be under any illusion about what President Putin is capable of doing in Ukraine," McCain said.
McCain's pronouncement was the first in a growing chorus of Republican lawmakers demanding the White House act.
The ranking Republican on the Senate Foreign Relations Committee, Sen. Bob Corker, R-Tennessee, said Obama must "lead a meaningful, unified response" to the crisis, something he has thus far failed to do.
"The Russian government has felt free to intervene militarily in Ukraine because the United States," Corker said in a statement, "along with Europe, has failed to make clear there would be serious, potentially irreparable consequences to such action."
Corker said Congress would consider targeted sanctions against Russia but pressed again for immediate action from the White House.
"The United States and our European allies should immediately bring to bear all elements of our collective economic strength to stop Russian advances in Ukraine," he said.
The chairman of the House Armed Services Committee, Buck McKeon, R-California, painted the administration's hesitance to intervene in even starker terms.
"History judges perpetrators of these actions poorly, as it does those who stand idly by," McKeon said in a statement. "Our response should demonstrate the U.S. stands by its friends against bullies."
Calling Putin a would-be empire builder whose actions are a "throwback" to the Cold War, McKeon continued, saying Russia's military maneuvering has "violated the freedom of all Ukrainians."
Rep. Tom Cotton, R-Arkansas, gave perhaps the most cutting critique of the Obama administration's response.
"Emboldened by President Obama's trembling inaction, Vladimir Putin has invaded the Crimea region of Ukraine," Cotton, who sits on the House Committee on Foreign Affairs, said in a statement.
Cotton, the GOP challenger for incumbent Democrat Mark Pryor's senate seat, sketched out a series of potential actions President Obama could take against Russia should they not withdraw from the Crimea: revoking travel visas, freezing assets of senior Russian officials, rescheduling the G-8 summit in Sochi, suspending Russia from the forum of governments, and recalling the U.S. ambassador to Russia.
"Putin must be punished for his outlaw actions and the Russian people and elites must recognize they will pay a price for them," Cotton said.
Still, the Arkansas lawmaker believes the fate of Ukraine hangs in the balance.
"The hours ahead will decide whether this invasion of Crimea is repelled or expanded to the whole of Ukraine, and whether the West finally confronts Putin or again blinks in disgrace," he said.