Russian President Vladimir Putin is unlikely to comply with a sanctions ultimatum from U.S. President Donald Trump that demands a Ukraine cease-fire by Friday, according to an exclusive Reuters report citing people familiar with Kremlin discussions. Trump has warned he will impose additional sanctions and levy 100% tariffs on countries purchasing Russian oil if Moscow does not halt its campaign. The sources said Putin remains focused on seizing the remaining parts of the Ukrainian regions of Donetsk, Luhansk, Zaporizhzhia and Kherson—territories Russia claims as its own—before entering substantive peace talks. Kremlin advisers believe Russia can weather another round of U.S. penalties after 3½ years of war and successive sanctions packages, viewing Trump’s threat as “painful but manageable.” Negotiators from Moscow and Kyiv have met three times since May, but the discussions have produced little beyond humanitarian arrangements. Trump’s special envoy, real-estate executive Steve Witkoff, is expected in Russia this week for last-minute diplomacy. A White House spokeswoman said the president is prepared to escalate economic pressure if no cease-fire is reached.