For those with a vested interest in Ukraine, U.S. President Donald Trump's first week in office was a bit of a rollercoaster. During his first presidential term, Trump famously praised Russian President Vladimir Putin.

A victory for Putin means, in due time, a re-charting of the entire map of Europe, to suit his vision of a Russian empire that never lost the Cold War. The only way to end the war in Ukraine is to ensure that Russia loses and that Ukraine wins.

But there’s a surprising case in which Europe is cautiously optimistic: Ukraine. Trump’s threat to Russian President Vladimir Putin on Wednesday to impose new tariffs and sanctions on Moscow if it didn’t reach a deal to stop the war sent a welcome message to European allies and other Ukraine supporters.