The worry on the face of the Greek prime minister was plain to see as he arrived for his meeting with the president this morning.
The Socialist opposition are saying Greece no longer has any real government; its attempts to steer the country through difficult reforms, now off the rails.
But Costas Karamanlis is adamant the violence of the past few days is not acceptable.
“In these crucial times the political world must unanimously and categorically condem the agents of destruction and isolate them,” he told reporters. “We are obliged by our duty as a democracy. This is what the citizens demand. This is our debt to the nation.”