Trump's closest ally in Europe will head to Washington in the midst of a disagreement over Russian oil.

Trump's closest ally in Europe will head to Washington in the midst of a disagreement over Russian oil.

"Hungary is a landlocked country, it has no direct sea links, so it is forced to rely on pipelines for oil and gas," the Hungarian prime minister said

The Hungarian premier noted that one of the key topics of the talks in Washington will be peace in Ukraine