German conservative opposition leader Friedrich Merz was spotlighting his own trip to Kiev on Tuesday, after Chancellor Olaf Scholz ruled out a visit to war-torn Ukraine’s capital. The Ukrainian leadership has complained for weeks that Scholz’s government has been too slow in isolating Moscow and too hesitant in delivering heavy weapons to battle the Russian invaders. Kiev’s recent refusal to welcome a visit by German President Frank-Walter Steinmeier strained ties further. “A night in the sleeper car on the way to #Kyiv,” Merz wrote – using an alternative spelling for the city – on Twitter al…