Postcard from Kyiv: Trump Ukraine controversy raises new fear over Russia's aggression

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Since 2014, Ukraine has been at war with Russia in a conflict that has claimed nearly 13,000 lives. Now allegations President Trump held up U.S. aid in an effort to get Ukraine President Zelenskiy to investigate Joe Biden and his son have raised concerns over diminishing U.S. support in the country's fight against an emboldened enemy to the east.