On September 22nd Germany’s chancellor, Angela Merkel, won a landslide victory, boosting her Christian Democrats’ share of the vote to its highest since unification in 1990. Such a remarkable win after eight years in office during such a rocky period makes her the undisputed leader not just of Germany but of Europe. [The Economist]
The cartoon by Chappatte from the International Herald Tribune depicts Angela Merkel as a bride. She is wearing a wedding dress and carrying a bouquet of flowers with a German flag sticking out of the top. Instead of one normal-size groom, however, there are several small ones sitting on each other's shoulders. The one at the top, arm-in-arm with Merkel and holding a top hat, is French President François Hollande. Below him is Spanish PM Mariano Rajoy (I'm not sure about the others).
The cartoonist seems to be saying that Merkel is a giant in Europe, and that none of the other leaders can match up to her.
A bride is a woman who is getting married or who has just got married. A groom is a man who is getting married or who has just got married. See here for more wedding-related vocabulary.