Ukrainian President Volodymyr Zelenskyy on Sunday thanked European leaders for backing his push to join this weeks U.S.Russia summit, as Kyiv fears Washington and Moscow could strike a deal to end the war but in a way that undermines Ukraines sovereignty."The end of the war must be fair, and I am grateful to everyone who stands with Ukraine and our people today for the sake of peace in Ukraine, which is defending the vital security interests of our European nations," Zelenskyy said.PUTIN ALLY WARNS 'TITANIC EFFORTS' ARE UNDERWAY TO SINK TRUMP SUMMIT OVER UKRAINE WARThe leaders of Britain, France, Germany, Italy, Poland, Finland and the European Commission said in a joint statement that any diplomatic solution brokered between President Donald Trump and Russian President Vladimir Putin must protect the security interests of Ukraine and Europe."The U.S. has the power to force Russia to negotiate seriously," EU foreign policy chief Kaja Kallas told Reuters on Sunday. "Any deal between the U.S. and Russia must have Ukraine and the EU included, for it is a matter of Ukraines and the whole of Europes security," she added.ZELENSKYY WONT CEDE TERRITORY FOR PEACE DEAL AHEAD OF TRUMPPUTIN SUMMIT AS TRILATERAL MEETING TEASEDNATO Secretary General Mark Rutte said the upcoming summit "will be about testing Putin" and will serve as a measure of how serious the Russian leader is about "bringing this terrible war to an end."Both the White House and the Kremlin have acknowledged Zelenskyys request to join the talks, though no formal invitation has been issued. Trump and Putin are scheduled to meet in Alaska on Aug. 15. If Zelenskyy were to take part, the meeting would mark the first between Putin and Zelenskyy since the start of Moscow's war.SANCTIONING RUSSIA ACT THREATENS MOSCOW, ALLIES WITH 500% TARIFFSThe meeting, which Trump announced in a Truth Social post on Friday, comes on the heels of Washington's threats to impose steep tariffs on the Kremlin and its allies.Trump has previously singled out countries like India and Chinatop buyers of discounted Russian crude for undermining G7 price caps and weakening the impact of Western sanctions.In response, bipartisan lawmakers introduced the Sanctioning Russia Act, which would impose a 500% tariff targeting the core of Russias economy its oil and gas exports if Moscow continues to resist peace efforts or escalates the conflict.Meanwhile, a senior member of Putins inner circle warned that multiple countries are mounting "titanic efforts" to undermine the upcoming summit between the Russian leader and Trump."Undoubtedly, a number of countries interested in continuing the conflict will make titanic efforts to disrupt the planned meeting between President Putin and President Trump," wrote Russia's investment envoy, Kirill Dmitriev, in a Telegram post on Saturday, referencing the Kremlin's ongoing war in Ukraine.While Dmitriev did not name specific countries, he warned that critics of the upcoming talks could seek to sabotage the summit through diplomatic maneuvers or disinformation through the media.