President Obama held an hour-long phone conversation with Putin.
A few conservative Republicans had looked to Putin as a kindred spirit.
The former national security adviser says Russia is "vulnerable" to sanctions.
The legislation would allow the Obama administration to provide loan guarantees to Ukraine.
Jay Carney says the Crimean incursion is not a show of strength for Moscow.
At CPAC Rubio said U.S. is “on the verge of a new American century" but Dems are impeding it.
The White House on Thursday moved to impose economic sanctions and visa restrictions.
Resolution by the House Foreign Affairs Committee denounces Russia's intervention in Crimea.
“Ignoring threats to our national security is the Obama doctrine,” the ex-ambassador said.
The Russian foreign minister called the decision to impose sanctions "unconstructive."