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Russia invaded and annexed the Crimea in 2014 and continues to support pro-Russian rebels in eastern Ukraine. The proposal for providing weapons to Ukraine comes amid tension between the White House and Congress over how to respond to Russian interference in the 2016 election, and an investigation by Special Counsel Robert Mueller into possible collusion between the Trump campaign and Russia. President Trump signed a bill imposing sanctions on Russia for its cyberhacking and its actions in Ukraine but complained that it harmed relations.
While the three officials said no final decision has been made on providing the weapons, they agreed that the Pentagon is in favor of the move.
A Pentagon spokesperson would not confirm the details of the package, saying only, "we haven't ruled anything out."
"I can certainly say that we have not provided defensive weapons nor have we ruled out the option to do so," said State Department spokesperson Heather Nauert during a briefing Thursday.
Still undecided, said the three officials, is whether the U.S. would provide the Javelins through an intermediary and whether U.S. service members would train the Ukrainian military on how to operate them.
The most common Russian tank is the T-90, according to Loren Thompson, chief operating officer of the Lexington Institute, a conservative think tank. The Javelin attacks tanks from above, one of the most vulnerable spots of the tank, he explained, adding that other shoulder-fired weapons like an RPG could not take out a Russian tank.
Thompson warned that providing lethal weapons to Ukraine — a country "on Russia's doorstep" — is not without peril for the U.S. "What would we think if the Russians were arming Mexico?" he asked. "This could potentially spark a wider war."
Former Acting CIA Director John McLaughlin, an NBC News analyst, said that the Russians had "earned" the U.S. aid to Ukraine, "but will see it as an escalation even though it poses no immediate danger to their forces given the disposition of the two sides and the nature of the current skirmishing."
"The U.S. should portray this as an enhancement of Ukrainian defensive capabilities, and part of the deal with Kiev should be that they not use the Javelins to provoke fighting but instead hold onto them for a contingency in which Russia actually uses armor to extend its invasion — which it has not been doing lately."
Courtney Kube is a correspondent covering national security and the military for the NBC News Investigative Unit.
Robert Windrem is an investigative reporter/producer with NBC News, specializing in international security.