The U.S. election is a make-or-break moment for aid to Ukraine

Tensions are likely running high in Kyiv ahead of Tuesday's presidential election in the U.S. — a vote that could make or break ongoing aid for Ukraine.

The latest poll from NBC News showed a "deadlocked race" between Republican nominee and former U.S. President Donald Trump and the Democrats' candidate, current Vice President Kamala Harris.

For Kyiv, the big issue is how much support and financial backing it will continue to receive after White House leader Joe Biden, who has been in term throughout Russia's war in Ukraine, leaves office.

After almost three years of fighting, there's no doubt that funding fatigue is setting in among Kyiv's biggest military supporters, particularly the U.S., despite ongoing public shows of support for Ukraine from the White House and NATO.

It's widely agreed that a Trump administration and hard-line Republicans would be far more hostile toward granting Ukraine more military aid, significantly inhibiting its ability to continue to fight back against Russia. However, it's also likely that even a Kyiv-friendly administration under Kamala Harris, who has pledged to continue supporting the war-torn nation, could struggle to convince U.S. lawmakers to give far more financial backing to Ukraine.

Officials in Kyiv say the election is being watched closely, amid concerns that future aid could be cut.

"Of course, we understand that this is one of the possible scenarios which would be heavily unfavorable for Ukraine," senior Ukrainian official Yuriy Sak told CNBC last week.

"But on our part, we will do everything to continue to convince our partners in the U.S. to maintain the funding and the support at the same level, because the alternative is bad for all parties involved, including the United States of