He is of course not the first Mayor pledging to clean up the capital.
This year, the Mayor pledged to allocate $1.4 billion for school repairs over the next four years.
The proposed plant would sit in the middle of that redevelopment, and the mayor had pledged to come up with another site for it.
The Mayor said he was disappointed by the rating cut but pledged to continue his administration's efforts to improve the city's finances.
The Mayor has repeatedly pledged to return any of the city's windfall to taxpayers.
The mayor pledged support for the children of those who were lost, saying: "They will be able to go to college, if they want.
The mayor, who tried last year to close several centers for the elderly, pledged to keep the centers open.
The Mayor has firmly pledged that under his leadership over 40 percent of new homes for social rent should be for families.
"My administration will never lead by dividing," the Mayor pledged, echoing a campaign theme that attracted many voters last fall.
The Mayor has pledged to uphold the law.