However, I would be surprised if you didn't heard any of the lesser Union politicians using stronger language, and the reaction from SPD guys. Even FOCUS titles its article Koalition: Streit um Obama-Rede verschärft sich ( = [Governing] Coalition: fight over Obama speech intensifies).

Say, there was CSU boss Huber, who spoke as if only people with a role in Reunification have a right to speak there. He attacked foreign minister Franz-Walter Steinmeier/SPD (who praised Berlin's decision) for "chumming up to a likely favourite".

For the SPD's part, party secretary Hubertus Heil reminded in reaction to talk about a campaign event that Merkel herself campaigned in the USA during the 2002 federal elections of Germany.

I have doubts, that Merkel really has a problem with Obama speaking at the Brandenburg gate.

Me too. But she has to please the more Republican-oriented Atlanticists in the CDU/CSU.

*Traitor*, n.
A benighted individual who perceives an illusory distinction between serving his nation and abetting the criminals who govern it.