It is not specified how exactly Trump influenced the Hungarian Prime Minister.
Orbán himself has not commented publicly on this information.
Previously, the Hungarian Prime Minister has repeatedly opposed Ukraine's membership in the EU, claiming that the country is not ready for accession, has no clear borders, and its integration would lead to a war between the EU and Russia.
Budapest has previously blocked EU initiatives in support of Kiev and sought to prevent the expansion of sanctions against Russia.
At the same time, Orbán has clearly indicated that he will support Moldova, which submitted an application together with Ukraine.
According to the Bloomberg news agency, the request to Trump to influence Orbán was made by European politicians.
Diplomats are now expressing hope that the impasse over Ukraine's candidacy will be overcome in the coming months.
A decision on the start of accession negotiations between Kiev and Chisinau with the EU could be made in the near future.
Relations between Kiev and Budapest, which had not been warm before, deteriorated further after Ukraine's attacks on the Druzhba oil pipeline, through which Hungary receives Russian oil.
Orbán took this as a threat and declared that Ukraine would not join the EU"through blackmail, bombings and threats."