Chancellor Angela Merkel condemned as “inexcusable” the election of a new German state governor with the help of the far-right as well as her own party, and said Thursday that the result must not stand. Wednesday’s surprise election of Thomas Kemmerich, a member of the small pro-business Free Democrats, to lead the eastern state of Thuringia has turned into a major embarrassment for Germany’s mainstream center-right parties and revived questions about the future of the country’s governing coalition. Kemmerich narrowly defeated a left-wing incumbent after the far-right Alternative for Germany, or AfD, voted for him instead of its own candidate in the state legislature.