President Joe Biden has told President Volodymyr Zelensky the US will stick by Ukraine "for as long as it takes" in its war with Russia.
“You will never stand alone,” Mr Biden told Mr Zelensky as he visited the White House on his first overseas trip since the Russian invasion began.
Mr Biden confirmed a new package of more than $2bn in assistance for Ukraine and promised another $45bn.
Mr Zelensky expressed his gratitude for Washington's backing.
At Wednesday's joint news conference, Mr Biden told reporters he was “not at all worried” about holding the international coalition together.
Amid concerns that some allies may be feeling the strain of the conflict's cost and disruption to global food and energy supplies, the US president said he felt “very good” about the solidarity of support for Ukraine.
Mr Biden said Russian President Vladimir Putin had “no intention of stopping this cruel war”.
As Ukraine's most important ally, the US has already committed $50bn of humanitarian, financial and security assistance - far more than any other country.
Mr Zelensky - wearing his trademark combat-green sweatshirt and boots - expressed hope that Congress would pass the extra $45bn in aid to Ukraine to “help us to defend our values, values and independence”.
Republicans - who will take control of the House of Representatives in January - have warned they will not write a "blank cheque" for Ukraine.
But Mr Zelensky, who travelled on a US Air Force jet from the Polish city of Rzeszow, said that “regardless of changes in the Congress”, he believed there would be bipartisan support for his country.
Bd-pratidin English/Tanvir Raihan
