U.S. President Donald Trump has publicly addressed Russian President Vladimir Putin, expressing that he is "very upset" and "furious" over Putin's recent comments about Ukrainian President Volodymyr Zelensky.

This reaction comes after Putin suggested a transitional government in Ukraine, effectively calling for Zelensky's ousting, which Trump criticized during a phone interview with NBC News, stating, "That's not going in the right direction."

Trump’s reprimand signals a shift in his stance, as he had previously expressed frustration with Zelensky, labeling him a "dictator." However, in light of Putin's latest remarks, Trump detailed an economic measure that could include a 25% tariff on all Russian oil, with the potential to increase to 50%.

He stated, "That would mean if you buy oil from Russia, you cannot do business in the United States."

This warning follows a recent partial ceasefire agreement between Russia and Ukraine, aimed at ensuring safe navigation in the Black Sea and halting attacks on energy facilities.

Despite this, Trump announced that sanctions would be swiftly enacted if Putin fails to take appropriate actions.

Trump and Putin are set to speak later this week, with Trump indicating his disappointment, saying, "Putin knows I’m angry, but the anger goes away quickly… if he does the right thing."

The potential measures from the United States may align with actions already undertaken by the European Union, which has imposed an embargo on Russian oil shipments since the escalation of hostilities.

Despite this, some EU member states, such as Hungary and Slovakia, continue to import Russian oil via pipelines.

Meanwhile, other NATO allies, including Turkey, as well as nations like China and India, have increased their purchases of Russian crude oil.

Refined products such as gasoline, diesel, and jet fuel derived from Russian oil are reportedly sold globally, including in the U.S. and Europe.

Trump's recent comments contradict prospects for improved U.S.-Russia relations that had been tentatively discussed, particularly following indications from the Biden administration regarding possible relief from sanctions on Moscow.

European nations have reacted strongly against the idea of resuming the purchase of Russian fossil fuels without a lasting peace and justice for Ukraine.

Earlier this week, U.S. Secretary of State Marco Rubio downplayed the prospects for high-level negotiations aimed at concluding the conflict, stating, "There is still much work to be done, and I believe there first needs to be more technical progress."

This technical aspect arises as Russia, alongside its allies, has demanded the demilitarization of Ukraine, rejected any Western military presence as peacekeeping forces, and insisted on the complete annexation of four Ukrainian regions, three of which are only partially occupied.

The ongoing war continues to have severe human costs, with reports stating that two people were killed and 25 injured in the Kharkiv area during Russian attacks overnight.

Additionally, a military hospital treating the wounded was also hit.

Ukraine's General Staff described these incidents as a "deliberate and targeted bombardment," acknowledging military casualties.

Trump’s intervention follows a tumultuous week for the White House, as senior officials faced scrutiny for discussing plans to bomb Houthi rebels in Yemen using the messaging application Signal, which is unauthorized by the Pentagon.

This sensitive discussion was inadvertently leaked when a journalist from a publication was mistakenly added to the chat by National Security Advisor Mike Waltz.