MOSCOW (Reuters) -- The Kremlin on Monday said it favored a “balanced approach” to the issue of nuclear weapons, not based on emotion, after a key ally of President Vladimir Putin called over the weekend for Russia to use a “low-yield nuclear weapon” in Ukraine. Asked about the comments by Ramzan Kadyrov, leader of the Chechnya region, who also criticised Russia’s military leadership over battlefield setbacks, Kremlin spokesman Dmitry Peskov said he had the right to voice his opinion, but that Russia’s military approach should not be driven by emotions. “This is a very emotional moment. The heads of regions have the right to express their point of view,” Peskov said in a call with reporters on Monday. “But even in difficult moments, emotions should be kept out of any kind of assessment. So we prefer to stick to balanced, objective assessments.”