Ukraine ’s new leader, Petro Poroshenko, said the violence that’s rocked the former Soviet republic’s easternmost regions must end this week as peace talks began involving an envoy of Russian President Vladimir Putin. Poroshenko, who took the oath of office June 7, said negotiations should be held daily. Yesterday’s three-way talks in Kiev included the Ukrainian ambassador to Germany , Pavlo Klimkin, the Russian envoy to Ukraine, Mikhail Zurabov, and Heidi Tagliavini, a special representative of the Organization for Security and Cooperation in Europe. “We must stop the violence this week,” Poroshenko said on his website. “Every day when people die, every day when Ukraine pays such a high price is unacceptable.” Poroshenko, who was sworn in a day after discussing proposals toward a cease-fire with Putin, used his inauguration speech to present a plan to bring peace after more than six months of unrest that’s pitted the U.S. […]