Trump is becoming increasingly frustrated with Putin.

When President Donald Trump spoke by phone with Vladimir Putin last week, the Russian leader pledged to draft and deliver a “memorandum of peace” outlining Russia’s conditions for a ceasefire with Ukraine, according to a U.S. official and a White House source familiar with the exchange.

However, more than a week after the call, the U.S. has yet to receive the promised document, the sources said. In response, Trump is now weighing the possibility of imposing new sanctions on Moscow, as his frustration over the ongoing conflict grows, according to individuals familiar with the situation.

Over the past several weeks, various sanction options have been prepared to penalize Moscow, but Trump has not yet signed off on them. Speaking on Sunday, the president said he would “absolutely” consider new sanctions following a wave of missile and drone attacks that resulted in significant casualties.

During their call last Monday, President Donald Trump urged Vladimir Putin to pursue direct negotiations with Ukraine to reach a peace agreement, emphasizing that Europe and the United States would provide support if needed, according to a White House official.

Following the call, Trump posted on social media, stating that the terms of a ceasefire “will be negotiated between the two parties, as it can only be.” The conversation came just days after initial direct talks between Russia and Ukraine in Turkey, which ended with expectations that Russia would follow up with a formal memorandum outlining its ceasefire terms.

While Russia was expected to send the memo to both Ukraine and the U.S., its failure to deliver it more than a week later suggests Trump left the door open for continued involvement in the peace process, rather than stepping back completely.

Ahead of the Trump-Putin call, Secretary of State Marco Rubio spoke with Russian Foreign Minister Sergey Lavrov, who said Moscow was preparing a document detailing its ceasefire conditions—something that could serve as the basis for broader negotiations. Rubio told CBS’ Face the Nation that if both Russian and Ukrainian proposals were presented, “we can work off of that,” adding, “Hopefully that will be forthcoming soon.”

On Tuesday, Russian Foreign Ministry spokesperson Maria Zakharova confirmed that the draft memorandum was still in progress. She said it would define principles for settlement, timelines for a potential peace deal, and terms for a temporary ceasefire, contingent on mutual agreement. Once completed, it would be delivered to Kyiv. Zakharova expressed hope that Ukraine was working on a parallel document.

Meanwhile, U.S. frustration continues to grow. Ukrainian President Volodymyr Zelensky accused Putin on Monday of “simply playing games with diplomacy and diplomats.”

In Washington, both Democratic and Republican lawmakers have begun pressing Trump to escalate sanctions on Moscow in response to recent missile and drone attacks. “All of us, by our public statements as well as private contacts, are pressing very, very hard,” said Democratic Senator Richard Blumenthal.

Blumenthal is a leading sponsor of a bipartisan Senate bill—co-sponsored by Trump ally Senator Lindsey Graham—aimed at imposing sweeping new sanctions on Russia. The bill includes “secondary sanctions,” such as imposing tariffs as high as 500% on countries that continue purchasing Russian energy. More than 80 senators have already backed the legislation.

According to Blumenthal, the bill was developed with “very extensive” input from U.S. allies, some of whom would be directly affected by the energy-related sanctions. Germany, France, and the U.K. have expressed strong support, he added.

Despite this pressure, Trump told European leaders in a recent call that he would not, for the time being, join them in imposing new measures against Moscow—despite having earlier signaled a tougher stance toward Putin, a European official said.

Senator Rubio explained Trump’s position during a Senate Foreign Relations Committee hearing, saying, “He believes that if you start threatening sanctions right now, the Russians will stop talking, and there is value in keeping them at the negotiating table. No one’s claiming this is guaranteed—but it’s the approach he’s taking.”

French President Emmanuel Macron responded to Trump’s latest remarks by expressing hope that the U.S. president would reconsider. “President Trump realizes that when President Putin said he was ready for peace, he lied,” Macron said on Monday. “We’ve seen Donald Trump express his anger. A form of impatience. I simply hope now that this translates into action.”

Trump has previously floated the idea of new sanctions targeting Russia’s banking sector, as well as secondary sanctions on countries buying Russian energy. Though both measures have been prepared, it remains unclear which—if any—Trump is prepared to implement in response to Russia’s latest attacks on Ukraine.