New Delhi, July 16 -- Russian President Vladimir Putin has sacrificed an estimated 1 million of his soldiers, killed and wounded, in a three-year campaign to crush Ukraine.

Now President Donald Trump is betting that his go-to economic weapon - tariffs - can succeed where Ukrainian drones and rockets haven't, and finally persuade Putin to end his war.

Tariffs, which the U.S. president has called " the most beautiful word in the dictionary,'' are taxes on imports. They are Trump's all-purpose fix - a tool he deploys to protect American industry, lure factories to the United States, tackle drug trafficking and illegal immigration, and raise money to pay for his massive tax cuts.

On the campaign trail last year, Trump promised he'd negotia...