Arshad Mohamed and Susan Heavey

WASHINGTON (Reuters] – Russia could invade Ukraine in days, or weeks. But it could choose to follow a diplomatic pathway, White House national security advisor Jake Sullivan indicated on Sunday.

We are now in the window. Russia may take military action on Ukraine any day, but it might be a few weeks away, or Russia could opt to follow the diplomatic route,” Sullivan said during the Fox News Sunday program.

Sullivan spoke out after U.S. officials claimed that Russia, who seized Crimea, Ukraine, in 2014, had about 70% of combat power needed to invade Ukraine.

Russia has gathered more than 100,000 soldiers near its border. Moscow said that it does not plan an invasion, but may take unspecified military actions if security requirements are not met.

These commitments include an assurance that NATO will not admit Ukraine. A demand which the United States of America and the Western security alliance (of 30 members) have rejected.

Russian actions could include annexes to Ukraine’s Donbass, the region where Russian-backed separatists escaped from Ukrainian government control. Sullivan said that Russia could take action as quickly as Monday, though it might be several weeks.

“We think that Vladimir Putin might order an attack against Ukraine,” Sullivan stated to ABC’s “This Week.”

There are many ways it could happen. You could see it happening tomorrow or in weeks. He’s put himself in a place with military deployments that he can act aggressively on Ukraine at any given time,” Sullivan stated, referring to Russian President Vladimir Putin.

Washington stated that it will not send U.S. troops to Ukraine for defense, as the country is not part of NATO.

Washington gave Kyiv weapons and said last week that it would send almost 3,000 additional troops to Poland, Romania and Romania in order to prevent any potential spillover from this crisis.

A witness to Reuters said that a U.S. military plane landed in Poland nL8N2UH069, on Sunday. The Pentagon announced Wednesday that approximately 1,700 military personnel, mainly members of the 82nd Airborne Division would be deployed from Fort Bragg in North Carolina to Poland.

Along with allies, the United States threatened Russia with severe economic sanctions. This could be financial sanctions, as well as measures to control exports nL1N2U01MK.

Wally Adeyemo (Deputy Treasury Secretary of the United States) said Sunday that sanctions against Putin and Russian officials would be devastating due to Russia’s dependence on Europe and its largest trading partner.

In an interview, he stated that the United States of America and Europe would work together in order to have an impact not only on the Russian economic system but also on President Putin.

Adeyemo reported that Russian financial institutions conduct approximately $46 billion of global financial transactions per day with around 80% in dollars. Russia is 40% dependent on Europe as its largest trading partner.

Adeyemo, when asked whether Russia could turn to China in place of the planned U.S. sanctions, said Russia’s close ties with West and the severe nature of the U.S. sanction.

China can’t provide Russia with what it doesn’t have,” said he, adding that China does not have the necessary technologies Russia needs from the United States. China also isn’t where Russian elites want to spend their money.

Russian elites aren’t putting money in China because they would lose access to the global financial system. He told CBS that they are putting their money in Europe as well as the United States. Their ability to continue doing business as they did in the past would be affected if we cut them off, as well their families.