Sahra Wagenknecht, long an icon of Germany’s far left, has been campaigning to shake up the country’s political spectrum with her own upstart party built around a populist appeal she dubs “left conservatism.” Her newly launched party, the Sahra Wagenknecht Alliance (BSW), broke from the hard-left Die Linke (The Left) party in January and scored 6.2% of the vote in Germany during June’s European Parliament elections. But the first real test for Wagenknecht’s brand of populism will be in upcoming state parliamentary elections in the German states of Thuringia, Saxony and Brandenburg. Polls have …