According to Biden's security advisor, a Russian invasion could occur 'at any moment'.

• On Sunday, Jake Sullivan, the White House national security advisor, cautioned that a Russian invasion of Ukraine could occur at any moment.
• In an interview on "Fox News Sunday," Sullivan stated that Russia could take military action against Ukraine at any time, it could be a few days or weeks from now, or Russia could opt for a diplomatic solution.
• According to two U.S. officials, Russia has amassed approximately 70% of the military strength it believes it would require for a complete invasion of Ukraine.

On Sunday, Jake Sullivan, the White House national security advisor, cautioned that a Russian invasion of Ukraine could occur at any moment.

In an interview on "Fox News Sunday," Sullivan stated that Russia could take military action against Ukraine at any time, it could be a few days or weeks from now, or Russia could opt for a diplomatic solution.

Several morning news programs featured Sullivan discussing the ongoing situation in Eastern Europe.

According to Reuters, the number of battalion tactical groups in the border region has increased to 83 from 60 as of Friday, with 14 more in transit. This comes after two U.S. officials stated that Russia has approximately 70% of the combat power it believes it would need for a full-scale invasion of Ukraine.

According to Sullivan, who spoke on "Meet the Press" on NBC, there is a belief that the Russians possess the ability to launch a substantial military operation in Ukraine and as a result, efforts have been made to prepare a response.

Different forms of attack could be possible, including annexing Ukraine's Donbass region, cyberattacks, or a full-scale invasion, as Sullivan told NBC.

Sullivan stated that the reason for the intense work over the past few months is not only to prepare for one possible outcome but also to prepare for all possible scenarios and collaborate with allies and partners on how to react in each situation.

If Russia launches an attack, the U.S. and its allies will act aggressively, with the U.S. threatening severe sanctions, for instance.

The timeline for diplomatic negotiations could be dwindling.

According to Sullivan, there is a high likelihood that Putin will launch an attack on Ukraine.

According to Reuters, if a full-scale Russian invasion takes place, thousands of civilians and soldiers could lose their lives.

The conflict in Ukraine could result in a range of casualties, with estimates suggesting that between 5,000 and 25,000 Ukrainian troops could be killed, while between 3,000 and 10,000 Russian troops could also suffer losses. Additionally, civilian casualties could range from 25,000 to 50,000, and millions of Ukrainians could be displaced as a result.

On Sunday, Sullivan issued a warning about the impact on Ukraine, but did not comment on the projections.

According to Sullivan, if Putin chooses to escalate the conflict in Ukraine, it will result in a significant loss of human life for Ukrainians. However, it will also have long-term consequences for Putin's strategic position.