President Joe Biden told Ukrainian President Volodymyr Zelensky in a roughly hour-long call Sunday that the US would respond "swiftly and decisively" if Russia takes further steps toward invasion, according to a White House readout of the call, CNN reports.
The call came amid US warnings that a Russian invasion of Ukraine could happen as soon as this week.
"President Biden made clear that the United States would respond swiftly and decisively, together with its Allies and partners, to any further Russian aggression against Ukraine. The two leaders agreed on the importance of continuing to pursue diplomacy and deterrence in response to Russia's military build-up on Ukraine's borders," according to the White House readout.
A senior Ukrainian official said Zelensky renewed calls for Washington to provide greater military and financial support to Ukraine and asked for Biden to visit Ukraine as soon as possible. US officials said a trip by Biden to Ukraine is extremely unlikely.
The official, who had been briefed on the conversation, told CNN that Zelensky used the call to suggest what the official described as "concrete ideas to diminish the Russian threat to Ukraine" such as providing Ukraine greater military support, including more advanced weaponry.
Zelensky also emphasized to Biden the need for a significant financial package for Ukraine, according to the official. The official told CNN the Ukrainian leader stressed to his US counterpart that strong economic support would -- in the words of the official -- "show Putin that the West stands with Ukraine, and that the impact of Putin's escalation would bear no fruit."
According to the Ukrainian official, Zelensky asked Biden to visit Ukraine as soon as possible, but that there had been no positive response from Biden. US officials said a trip by Biden to Ukraine is extremely unlikely.
When reached for comment by CNN, a White House official noted security assistance to Ukraine is ongoing, highlighted shipments in recent weeks and said the administration is exploring "additional macroeconomic support to help Ukraine's economy" amid the Russian military buildup.
