1D Trump was repeatedly pressed to stay in the deal by European leaders and the pope. Withdrawing would leave the United States aligned only with Russia among the world's industrialized economies.
2D Putin, however, said that Trump had failed to make good on his campaign promises to mend relations with Russia. “I would say the level of trust [between Russia and the US] is at a workable level, especially in the military dimension, but it hasn’t improved. On the contrary, it has degraded.” (already April 4, 2017)
3D Li Keqiang, the Chinese Premier, said in a Berlin speech, that fighting climate change is a "global consensus" and an "international responsibility."
4D Merkel said: "The times in which we could completely rely on others are over to a certain extent. That is what I experienced in the last few days, and why I can only say: We Europeans must really take our fate into our own hands."