President Donald Trump is ordering military aid to Ukraine to be paused after his Friday Oval Office argument with Ukrainian President Volodymyr Zelensky, a White House official told CNN Monday.

Withholding aid is another sign that the relationship between the Trump administration and Ukrainian leadership has deteriorated.

The move comes after Trump upended U.S. policy on Ukraine and Russia upon taking office in January, adopting a more conciliatory stance towards Moscow - and after an explosive con