Their tough stance followed talks at Camp David in which Mr Bush agreed to delay action until the new year.
This followed talks in Vladivostok.
The move followed talks with the British Government, which had been challenged by the commission, the European Community's executive body, over the 15 percent ceiling.
Thursday's announcement followed talks this week between representatives of the Government, the opposition and church leaders.
The announcement followed talks over the weekend that led President Goodluck Jonathan to announce a cut in petrol prices.
This accord followed talks on textiles, steel, cars (of course), rice, baseball bats and construction projects.
The violence and the killing of an Islamic militant on Thursday in an explosion at a telephone booth followed talks arranged by Washington.
The actions on rates followed lengthy talks between the two nations' central banks, monetary officials said.
Today's announcements followed closed-door talks that began on Friday.
There followed polite introductions, pleasant meals, regular talks and serious bargaining.