Since 2014, Ukraine has been at war with Russia. Now allegations President Trump held up U.S. aid in an effort to get Ukraine's president to investigate the Bidens have raised concerns over diminishing U.S. support in the country's fight.

Since 2014, Ukraine has been at war with Russia. Now allegations President Trump held up U.S. aid in an effort to get Ukraine's president to investigate the Bidens have raised concerns over diminishing U.S. support in the country's fight. https://t.co/uBYJoLbBE8

— NBC News (@NBCNews) December 27, 2019