US President-elect Donald Trump could hand Ukraine nuclear weapons to thwart President Vladimir Putin's Russia once and for all, an expert tells the Daily Express, the latter reported.

Trump stormed to a decisive election victory earlier this month, but his win sparked concerns in Ukraine about what this could mean for the US support in the war.

But despite fears that Trump could force Ukraine into an undesirable ceasefire deal, one expert believes the returning US President could take a different approach.

Nicholas Drummond, a security and defense expert, told the Daily Express that Trump could give Ukraine nuclear weapons.

"In the next four years Russia will rearm, but also Ukraine will recover and rearm and prepare. That preparation could be the US giving Ukraine nuclear weapons. A deal could be done very quietly, and suddenly Ukraine becomes very powerful," Drummond said.

"The US could say they will give Ukraine nuclear weapons but say you cannot join NATO," he added.