President Joe Biden heads to Europe this week in a trip meant to be a show of defiance.

He will mark a second year of war by denouncing Vladimir Putin’s invasion of Ukraine and publicly declare that the United States will support Kyiv until the final moments of the conflict.

But the backdrop to Biden’s trip is also complicated, dangerous and uncertain.

As the fighting continues to rage, both sides of the Atlantic fear that Russia is finding its footing, Ukraine may be overmatched in certain parts of the east and south and the West’s pipeline of weapons will slow to a trickle.

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