WASHINGTON (AFP) — Ukrainian President Volodymyr Zelensky has received a hero's welcome on his lightning trip to Washington where President Joe Biden committed nearly $1.8 billion in military supplies including, for the first time, the Patriot missile defense system.

Zelensky — whose media savvy and rugged demeanor have helped rally world opinion — wore his trademark green military fatigues as he held talks at the White House and addressed Congress, where he handed over an Ukrainian flag fresh from the battlefield to legislative leaders.

As Congress finalizes a new package of $45 billion, Zelensky voiced gratitude and said that the new year would mark the "turning point" in the fight against Russia.

"Against all odds and doom-and-gloom scenarios," Zelensky said in a speech that drew standing ovations, "Ukraine is alive and kicking."

"Your money is not charity. It's an investment in the global security and democracy that we handle in the most responsible way," Zelensky said.

House Speaker Nancy Pelosi, who welcomed Zelensky in one of her last acts before Republicans take control, likened the address to Winston Churchill's Christmas-time visit in 1941 days after the Pearl Harbor attack — and the Ukrainian leader was unafraid to encourage the parallels.

Comparing Ukrainian forces to Americans on the frontlines in World War II and the Revolutionary War, Zelensky said that Russians "burn and destroy everything" in a way "similar to the other tyranny" of Hitler.

"Ukraine holds its lines and will never surrender," Zelensky said to applause.

Ukraine enjoys wide support in the United States but several hard-right Republicans have been critical, considering the aid a giveaway of taxpayer money.

Kevin McCarthy, likely to become speaker next month after a narrow Republican election victory, has warned he will not give a "blank check" to Ukraine, a comment seen as attempting to mollify his right flank.

'You will never stand alone'

Biden, wearing a tie in the blue and yellow colors of the Ukrainian flag, affectionately put his hand over the wartime leader's shoulder as he saw him for the first time in person since the war began.
"You will never stand alone," Biden told him at a joint news conference.

"The American people are with you every step of the way and we will stay with you — we will stay with you — for as long as it takes."

Biden said that Americans "understand in our bones that Ukraine's fight is part of something much bigger."

"Together I have no doubt we'll keep the flame of liberty burning bright and the light will remain and prevail over the darkness."

Biden approved another $1.85 billion from previously budgeted funds for Ukraine, including Patriots which can shoot down cruise missiles and short-range ballistic missiles.

Ukraine fears a rising onslaught of missiles and has faced a slew of attacks from drones, many bought by Russia from Iran, as Moscow pummels power plants and other civilian infrastructure just as the country shivers in the winter cold.

Zelensky in his speech to Congress played up the role of Iran, against which Republicans almost universally favor a hard line.

Zelensky flew in secret to the United States straight after a risky visit to the frontline in Bakhmut, where Ukrainian and Russian troops have both endured heavy tolls over the past two months.

He presented Biden with an award from a captain on the ground operating a HIMARS rocket system, which has been a game-changer on the battlefront.

"He's very brave and he said, give it to a very brave president," Zelensky said.