Here's a detailed timeline of events, which shows the White House was aware of the pause in real time and Trump's decision to reverse the action -- following an unproductive phone call with Russian President Vladimir Putin and a subsequent series of brutal Russian assaults on Ukraine.

As President Donald Trump sours on Russia’s Vladimir Putin, the Pentagon approves Ukrainian weapons requests and Congress moves toward a new sanctions bill.

Following the Pentagon announcing a pause on weapons, the U.S. president said Ukraine must defend itself from Russia.

Hours after Pres. Trump railed against Vladimir Putin, saying "he’s very nice all the time, but it turns out to be meaningless," Russia unleashed more than 700 drones into Ukraine.

The number of Russian drones and missiles in the barrage set a single-night record and underscored Ukraine’s need for weapons.

Trump’s decision to help Ukraine fight an onslaught of Russian attacks reverses a Pentagon decision to withhold defensive weapons.

Panelists Elizabeth Pipko and Erin Maguire discuss President Donald Trump's frustrations towards Russian leader Vladimir Putin, victories under Trump’s second administration and more on ‘Fox News @ Night.

Frustration and anger have roiled some of President Donald Trump’s most loyal supporters, who fear he is going back on promises crucial to his MAGA movement.