US President Donald Trump voiced anger at Russian President Vladimir Putin for comments he made about Ukraine and its president Volodymyr Zelenskyy. Trump was referencing comments Putin made that he "considers Zelenskyy not credible." "He's supposed to be making a deal with him, whether you like him or whether you don't like him. So I wasn't happy with that," Trump said. Putin repeated his claim that Zelenskyy, whose term expired last year, lacks the legitimacy to sign a peace deal. Nonetheless, Trump reiterated that he and Putin have a “very good relationship," and shifted some of his criticism to Zelenskyy. “He’s trying to back out of the rare earth deal," Trump said, referring to an agreement that would provide the US with access to Ukraine’s rare earth minerals. “If he does that, he’s got some problems. Big, big problems.” “We made a deal on rare earth. And now he’s saying, well you know, I want to renegotiate the deal," Trump said. "He wants to be a member of NATO. He was never going to be a member of NATO. He understands that.” The US has been pushing for a comprehensive ceasefire deal between Russia and Ukraine to peacefully end their 3-year-old war. Russia has effectively rejected a US proposal for an immediate and full 30-day halt in the fighting, and the feasibility of a partial ceasefire on the Black Sea was thrown into doubt after Kremlin negotiators imposed far-reaching conditions. Trump’s comments on Putin come after weeks of intense pressure on Ukraine to agree to a ceasefire.