BRUSSELS — Defense Secretary Pete Hegseth on Wednesday called Ukraine’s desire to recover all of the territory it has lost to Russia since 2014 an “unrealistic objective,” pledging that the Trump administration will pursue peace negotiations to end war between the two nations while pointedly shaping them at their outset.Chasing this illusionary goal will only prolong the war and cause more pain and suffering,” Hegseth said. Any peace deal, Hegseth added, must come with “robust security guarantees,” international oversight of the boundary between Russian and Ukrainian forces, and no NATO membership for Ukraine — something that would require other countries to defend Ukrainian territory in any future conflict.