Medvedev accused Trump of playing “the ultimatum game with Russia” earlier this week.
In a post on X, he said “each new ultimatum is a threat and a step towards war”.
He also described Trump’s ultimatum as “theatrical” earlier in July, saying that “Russia didn’t care”.
Writing on Telegram on Thursday, Medvedev warned of a “dead hand” threat – which some military analysts understood as a reference to the codename of Russia’s retaliatory nuclear strikes control system.
Friday wasn’t the first time Trump responded to Medvedev’s comments. On Thursday, he described Medvedev as “the failed former president of Russia, who thinks he’s still president”.
Trump also warned Medvedev to “watch his words”, adding that “he’s entering very dangerous territory!”
Medvedev supports Russia’s war in Ukraine and is an outspoken critic of the West.
He was Russia’s president from 2008 to 2012, and now serves as deputy chairman of Russia’s Security Council.