Chancellor Angela Merkel's move to help President Nicolas Sarkozy in his bid for re-election is unprecedented. But so too is the European debt crisis. Berlin is driven by the fear that a Socialist president in Paris may overturn its strategy to rescue the euro. But Merkel's campaign assistance poses risks. This article was written by SPIEGEL journalists whose names are listed at the end of the article.

It looked almost as if it could have been a wedding when German Chancellor Angela Merkel and French President Nicolas Sarkozy walked into the conference hall of the European Council building in Brussels last Monday. They nodded at each other and exchanged pecks on the cheek, the other heads of state and government moved aside.

The two, of course, were not in Brussels to be betrothed. Rather, they were the main characters at yet another European Union summit. This time, they were seeking support for their fiscal pact, which together they had hammered out in the hopes that it could contribute to saving the E.U. and its common currency.

Once the pact had received the necessary backing, Merkel was visibly pleased -- and she made no attempt to hide her affinity for Sarkozy. "My political views are well known," she said following the summit. And then came a sentence that had been previously unimaginable for a German chancellor. "Nicolas Sarkozy supported me during my campaign. In the same way, I will now pay back that which he gave me."

The sober chancellor and the peripatetic president have established a pact, the likes of which has never before been seen in the Franco-German relationship. Merkel has decided to openly campaign for her partner in Paris. For Sarkozy, she is discarding the reserve that chancellors have for decades felt proper when it comes to democratic elections outside German borders. When Sarkozy begins stumping, she will be standing next to him on stage -- at least that is the plan.