German Chancellor Angela Merkel's calendar this past week looked like this: unpack from an Italian vacation, catch up with advisers and kick off a campaign with a small-town rally for an election that will be held in just five weeks.

In the United States, the 2016 campaign is well under way, with contenders jostling to give speeches in the battleground state of Iowa. But in Germany, where regulations keep political ads largely off the airwaves, the sleepy federal election campaign fired up only last week, when parties were finally allowed to string up signs on light poles.

Merkel's main challenger, Peer Steinbrueck, also just dusted himself off from a weeklong vacation and has been barnstorming from one half-timbered town square to another, although according to many local observers, the battle remains as lukewarm as any in memory.