German Chancellor Friedrich Merz reshuffled top posts on Friday as he tries to boost the fortunes of his deeply unpopular government ahead of regional elections in which a far-right party could get its first state governor.Merz took office less than 15 months ago with pledges to reform and turn around Germany’s economy, Europe’s biggest, after years of stagnation. But that economic turnaround has been slow to start. And the middle-of-the-road coalition of Merz’s center-right Union bloc and the center-left Social Democrats, two traditional rivals, has yet to persuade voters that it can produce results.