This was reported by Reuters, citing informed sources.According to these sources, Putin believes the Russian economy is strong enough to withstand additional economic measures. They also note that his territorial demands may expand due to advances by Russian forces, despite Trump’s threats.Putin is convinced that Moscow has survived the toughest Western sanctions so far and can endure, in particular, U.S. sanctions on oil."Putin thinks no one has seriously engaged with him on the details of peace in Ukraine - including the Americans - so he will continue until he gets what he wants. Putin values the relationship with Trump and had good discussions with Witkoff, but the interests of Russia come above all else," a source told Reuters.Another source said that for Putin, the main goals of the war against Ukraine (stopping NATO expansion, reducing the Ukrainian army, and forcing Ukraine’s neutrality) are more important than potential economic losses from Western sanctions.According to two people familiar with the situation, Russia holds an advantage on the battlefield, and its war-focused economy produces more artillery ammunition than NATO.“Putin could fight on until Ukraine's defences collapse and widen his territorial ambitions to include more of Ukraine, the sources said,” the article states.A third source told the news agency that the Kremlin might halt its offensive after capturing the Luhansk, Donetsk, Zaporizhzhia, and Kherson regions if it faces significant resistance. But if resistance is weak or absent, Russian forces may advance toward Dnipro, Sumy, and Kharkiv.A day earlier, Donald Trump announced plans to impose secondary tariffs on Russia, potentially reaching 100% if a peace agreement with Ukraine is not reached within 50 days.The European Union’s High Representative for Foreign Affairs, Kaja Kallas, said Trump’s 50-day deadline to end the war in Ukraine is “a very long time.”Deputy Chairman of the Security Council and former Russian President Dmitry Medvedev dismissed Trump’s statement as a “decorative ultimatum” that went unnoticed in Moscow.