PHOTO FROM JOE BIDEN FACEBOOK PAGE

WASHINGTON/KYIV 鈥 US President Joseph R. Biden predicted on Wednesday that Russia will make a move on Ukraine, saying Russia would pay dearly for a full-scale invasion but suggesting there could be a lower cost for a 鈥渕inor incursion.鈥

Mr. Biden鈥檚 comments at a White House news conference injected uncertainty into how the West would respond should Russian President Vladimir Putin order an invasion of Ukraine, prompting the White House later to seek to clarify what Mr. Biden meant.

鈥淢y guess is he will move in,鈥 Mr. Biden said of Mr. Putin at a news conference. 鈥淗e has to do something.鈥

鈥淩ussia will be held accountable if it invades 鈥 and it depends on what it does. It鈥檚 one thing if it鈥檚 a minor incursion and we end up having to fight about what to do and what to not do, et cetera,鈥 Mr. Biden said. 鈥淏ut if they actually do what they鈥檙e capable of doing … it is going to be a disaster for Russia if they further invade Ukraine.鈥

Russian officials have repeatedly denied planning to invade, but the Kremlin has massed some 100,000 troops near Ukraine鈥檚 borders, a buildup the West says is preparation for a war to prevent Ukraine from ever joining the NATO Western security alliance.

Shortly after the nearly two-hour news conference ended, the White House stressed any Russian military move into Ukraine would elicit a tough response.

鈥淚f any Russian military forces move across the Ukrainian border, that鈥檚 a renewed invasion, and it will be met with a swift, severe, and united response from the United States and our allies,鈥 said White House press secretary Jen Psaki.

But cyberattacks and paramilitary tactics by Russia 鈥渨ill be met with 鈥渁 decisive, reciprocal, and united response,鈥 she said.

Mr. Biden said a third summit with Mr. Putin 鈥渋s still a possibility鈥 after the two leaders met twice last year. He said he was concerned that a Ukraine conflict could have broader implications and 鈥渃ould get out of hand.鈥

Speaking to reporters at length about the crisis threatening to engulf his presidency, Mr. Biden said he believed Mr. Putin would test Western leaders. The response to any Russian invasion, he said, would depend on the scale of Moscow鈥檚 actions and whether US allies squabbled over how to react.

Mr. Biden and his team have prepared a broad set of sanctions and other economic penalties to impose on Russia in the event of an invasion and the US president said Russian companies could lose the ability to use the US dollar.

Pressed on what he meant by a 鈥渕inor incursion,鈥 Mr. Biden said NATO allies are not united on how to respond depending on what exactly Mr. Putin does, saying 鈥渢here are differences鈥 among them and that he was trying to make sure that 鈥渆verybody鈥檚 on the same page.鈥

鈥淏ig nations can鈥檛 bluff, number one. Number two, the idea that we would do anything to split NATO … would be a big mistake. So the question is, if it鈥檚 something significantly short of a significant invasion or … just major military forces coming across. For example, it鈥檚 one thing to determine if they continue to use cyber efforts; well, we can respond the same way,鈥 Mr. Biden said.

Mr. Biden said Mr. Putin had asked him for guarantees on two issues: that Ukraine would never join NATO and that 鈥渟trategic鈥 or nuclear weapons never be stationed on Ukrainian soil.

US officials see limiting NATO expansion as a non-starter, but Mr. Biden noted there was little chance of Ukraine joining the alliance soon and he suggested there could be a deal under which the West might not station nuclear forces in Ukraine.

鈥淲e can work out something on the second piece,鈥 depending on Russia鈥檚 own posture, Mr. Biden said.

Visiting Kyiv in a show of support, US Secretary of State Antony Blinken said Russia could launch a new attack on Ukraine at 鈥渧ery short notice鈥 but Washington would pursue diplomacy as long as it could, even though it was unsure what Moscow really wanted.

The Kremlin said tension around Ukraine was increasing and it still awaited a written US response to its sweeping demands for security guarantees from the West, including a halt to further NATO expansion and a withdrawal of alliance forces from central and eastern European nations that joined it after 1997. 鈥 Reuters