British Prime Minister Rishi Sunak will announce a 500-million-pound ($617 million) uplift in military support for Ukraine during his visit to Poland on April 23. The announcement will come with a warning that defeating Russia is imperative to halt any further advancement of its troops into Europe. Sunak’s trip to Poland to meet Prime Minister Donald Tusk marks his first international visit in months. The purpose is to demonstrate to his restless party that he remains in control ahead of an upcoming election, which many anticipate he will not win. Sunak will then travel to Germany to meet Chan…