In response to the escalating threat, President Trump confirmed that the U.S. will send additional Patriot air defense missiles to Ukraine. He noted that the European Union would finance the purchase of what he described as "various pieces of very sophisticated" U.S. weaponry.

The brief stated that cyber criminals "tried to steal data and to interrupt election processes by targeting election infrastructure, but these actions did not achieve a notable disruptive effect."

Obama’s postpresidential office declined to comment Wednesday but issued a rare response a day earlier. “These bizarre allegations are ridiculous and a weak attempt at distraction,” said Patrick Rode...