What should the United States do to help end the war in Ukraine, according to Timothy Snyder?

According to Timothy Snyder, the US should increase its assistance to Ukraine beyond the current 0.15% of GDP. He advocates for enforcing stricter sanctions on Russia to make it harder for them to prosecute the war, while providing more support to Ukraine as the defender. Snyder emphasizes that ending a war requires making conditions harder for the aggressor and easier for the defender, not the other way around. He also suggests that with uncertain US policy, European nations must step up to ensure Ukraine can defend itself and provide all possible economic aid immediately.