<h1>Trump Aides Criticize Zelenskyy, Urge Gratitude, as U.S.-Ukraine Tensions Rise; Congress Divided Over Trump's Approach</h1> President Trump's aides and Republican allies criticized Ukrainian leader Volodymyr Zelenskyy, suggesting he should show more gratitude for U.S. support and consider resigning amid the ongoing conflict with Russia. This follows a tense Oval Office meeting where Trump and Vice President JD Vance canceled an economic agreement with Ukraine. White House officials, including National Security Adviser Mike Waltz, questioned Zelenskyy's readiness to negotiate peace with Russia. Meanwhile, some U.S. lawmakers, like Senator Lisa Murkowski, criticized Trump's stance, fearing it undermines U.S. democratic values and support for allies. The situation has strained U.S.-Ukraine relations and divided opinions in Congress.