Defense Secretary Austin makes surprise visit to Ukraine

• During its counter-offensive, Ukraine expended large amounts of artillery, ammunition and some fighting vehicles. Kyiv has said its forces need additional military supplies to counter Russia.
• However, political chaos in Congress and opposition from some Republicans have stalled President Biden's request for additional military aid for Ukraine.

What they're saying: "I'm here today to deliver an important message – the United States will continue to stand with Ukraine in their fight for freedom against Russia's aggression, both now and into the future," Austin said in a social media post.

Between the lines: As the war has worn on, public support for continued U.S. aid to Ukraine has begun to wane.

• The share of Americans who say the U.S. is doing "too much" to help Ukraine rose to 41% last month — driven by growing concern among Republicans, a Gallup survey found.

The big picture: Last winter, Russia repeatedly bombed civilian infrastructure, like energy facilities, to cause massive blackouts and force Ukrainian citizens to ration energy.

• This year, Ukraine has additional air defense systems to combat Russian air strikes.

Go deeper ... Scoop: Fox chairman Lachlan Murdoch met in Ukraine with Volodymyr Zelensky