Trump has insisted he wants the war in Ukraine to end and that he is "disappointed" and "very, very unhappy" with Vladimir Putin, but Russia deemed this new demand "unacceptable," insisting the invasion will continue until its goals are achieved.

Deputy Foreign Minister Sergey Ryabkov said Tuesday that "any attempt to make demands, especially ultimatums, is unacceptable to us," according to Russia's state news agency TASS.

"We need to focus on political and diplomatic work. The President of the Russian Federation has reiterated that we are ready to negotiate and that the "A diplomatic approach is preferable for us," Ryabkov said. "If we don't achieve our goals through diplomacy, the SVO (war in Ukraine) will continue... This is an unwavering position. We would like Washington and NATO as a whole to take it very seriously." Kremlin spokesman Dmitry Peskov, meanwhile, called Trump's announcement "quite serious." "Some of this is directed personally at Russian President Putin. We definitely need time to analyze what was said in Washington," Peskov said during his daily press conference on Tuesday. “If President Putin deems it necessary, he will certainly comment on it. I don’t want to get ahead of myself, so let’s wait for Putin to decide whether he will comment on it himself.” Former Russian President Dmitry Medvedev, close to the Kremlin, called Trump’s comments a “theatrical ultimatum” in a social media post, adding that “Russia didn’t care.” On Tuesday, Trump declared, “If we don’t have a deal in 50 days, too bad.” At the time, Trump claimed that “the tariffs and other sanctions will go away. ”but added that Ukrainian President Volodymyr Zelensky should not attack Moscow.

On Monday, in the Oval Office with visiting NATO Secretary General Mark Rutte, Trump declared, We are very unhappy with Russia. He also announced a deal for the United States to sell additional weapons to its NATO allies, with the understanding that they will then send the weapons to Ukraine.

"We won't buy it, but we will make it, and they will pay for it," Trump said.

"This is really important," Rutte said. “And the decision is that we want Ukraine to have what it needs to sustain itself and defend itself against Russia, but we want the Europeans to pay for it, which is totally logical.”

Trump again expressed his frustration with Putin, whom he recently called “completely crazy” for ordering attacks on civilian areas in Ukraine.