The war-torn country is battling to secure crucial funding from the IMF and EU, as well as putting up taxes.
A nationwide vote would be difficult, but some say there are good reasons to hold one soon.
The last-minute meeting in New York comes amid Trump's increasing criticism of US funding for the war in Ukraine.
The BBC's international editor explains how Russia is seizing the opportunity to hit Ukraine in new deadly strikes.
Some right-wing US politicians want Ukraine to vote as scheduled next year. Ukrainians don't.
Ukraine's foreign minister tells the BBC nations that don't back Ukraine will be held to account.
The story of Russia's rapid advance in southern Ukraine, told by the people who managed to stop it.
How Russia's plan to overthrow Ukraine's government ended in embarrassing failure.
Ukraine's leader speaks to John Simpson before the anniversary of Russia's invasion on 24 February.
