Tuesday, the G-20 will say its biggest countries are ready to spend more.
"If you take the whole of europe together, it's still the largest economy in the world, said Kemal Dervis, Brookings Institution.
"Getting that economy on track is of crucial importance for everybody at the G-20."
There are a lot of issues here to deal with including energy. G-20 protesters represent three quarters of a million people against fossil fuels.
On Monday President Obama met for two hours with Russian President Vladimir Putin.
Violence in Syria was tops on their agenda.
In Washington, there's pressure on President Obama to get Russia's support.
"No one that I know of wants American boots on the ground, wants unilateral united states action," said Arizona Senator John McCain.
Publicly, there was no talk of ousting Syria's president - which the U.S. is pushing and Russia is not.
On Europe, there may be pushback.
The head of the european commission told reporters: "we're not here to receive lessons on democracy or how to run our economy."