Sarah Palin
Sarah PalinReuters

Former Republican vice presidential candidate Sarah Palin suggested on Saturday that only the United States could stop Russia’s invasion of Ukraine, AFP reported.

Palin, who spoke at the Conservative Political Action Conference (CPAC), offered unsolicited advice to President Barack Obama on containing Russian aggression, saying that "the only thing that stops a bad guy with a nuke is a good guy with a nuke."

Analysts have noted that Palin seemed to have predicted the current Ukraine crisis during the 2008 election campaign.

At the time, Palin warned that if then-Senator Barack Obama were elected president, his "indecision" and "moral equivalence" may encourage Russia's Vladimir Putin to invade Ukraine. She was mocked at the time by the editor of the Foreign Policy magazine, who wrote then that Palin's comments were "strange" and "this is an extremely far-fetched scenario."

On Saturday, Palin attacked what she called a feckless Obama foreign policy that she said has helped embolden Putin. Palin’s running mate in 2008, Senator John McCain, made similar comments last week at the AIPAC policy conference in Washington.

Failing to show peace through strength has allowed some "very, very, very bad dudes (to) gain ground," said Palin at CPAC.

Obama "would gut our arsenal while he allows others - enemies - to enrich theirs, she said.

"Mr. President, the only thing that stops a bad guy with a nuke is a good guy with a nuke," declared Palin.

The comments came as the U.S. once again warned Russia over Ukraine, despite the fact that Russia on Friday was unfazed by threats of U.S. sanctions.

The BBC reported that Secretary of State John Kerry told Russian counterpart Sergei Lavrov on Saturday that any moves to annex Crimea would close the door to diplomacy.

Kerry said that Crimea is part of Ukraine and Moscow should avoid military escalation.

On Friday, Lavrov told Kerry that imposing sanctions on Russia “would inevitably hit the United States like a boomerang.”

Lavrov’s remarks came several days after the Foreign Relations Committee in the Senate said it was preparing legislation to provide support to Ukraine and consulting with the Obama administration on possible sanctions against individual Russians and Ukrainians cooperating with them.