Ukraine has grown increasingly anxious over delays to new U.S. aid, with Kyiv's leader, Volodymyr Zelensky, warning Russia could advance to "big cities."

Russian propaganda pushed by the Kremlin has “infected” part of the Republican base, a senior GOP congressman has said, as indications grow that a vital U.S. military package for Ukraine will come up for a vote with U.S. lawmakers this month.

“I think Russian propaganda has made its way into the United States, unfortunately, and it’s infected a good chunk of my party’s base,” House Foreign Affairs Committee chair and Texas Republican, Michael McCaul, told Puck News.

A new tranche of military, economic and humanitarian aid for Ukraine, worth around $60 billion, has been ensnared in Congress for months by infighting, causing deep concerns in Kyiv as Russian forces inch westward and gain territory while Ukrainian forces contend with shortages along the frontlines.