BERLIN (Reuters) – A leftist politician who quit Germany’s Left party and this week set up her own could win as much as 14% of the vote in national elections, dealing heavy blows to both conservatives and the far right, a new poll has found. Sahra Wagenknecht, born in East Germany in 1969 to Iranian and German parents, launched her party “Sahra Wagenknecht Alliance – Reason and Justice” (BSW), promising to “save democracy” from the far right with a mix of paternalistic economic, conservative social and nationalistic foreign policy. The backdrop – of an electorate made sullen by the economic sh…