BERLIN — Chancellor Friedrich Merz often warns that Germany is living through deeply insecure times — and increasingly, it looks like his own government could become a casualty. Merz’s ideologically divided government is under growing pressure to respond to rising anxiety in Germany over the country’s economic future as key manufacturing sectors decline and the fallout from wars in Ukraine and Iran mounts. Merz’s coalition of conservatives and the center-left Social Democratic Party (SPD) is