I did some further checking into comparison Vermont as far CO2 emission, Vermont is about 1/2 the emissions of US average, which isn't as impressive as thought it would be, but I would say very roughly if all states had as much of the electrical power coming from nuclear generators as Vermont, we would reduce the overall US emission of CO2 by about 25%- in other words we would easily exceed Kyoto [which is was somewhere around 7 or 10% reductions].
That would require significant political commitment to increasing the number of nuclear powerplants and would still require decade or more to bring this about.

I think it would better if there were more modest goals, say a 50% increase in nuclear plants say within two decades- having 150+ nuclear plants in US. This would probably get around a 5-10% reduction [SWAG]. A better focus for the nation would be to reduction electricity cost [with nuclear generators being part of this solution]. The media [being the idiots they are] focus on rising or falling gasoline prices and gasoline prices aren't as significant in terms cost to US consumer as residential electrical power costs.
Here chart called: "Average Retail Price of Electricity to Ultimate Customers by End-Use Sector, by State, Year-to-Date through March 2006 and 2005
(Cents per kilowatthour)"
The US average residential cost is 9.73 cents per kwh. Commerical: 8.97 cents per kwh. Industrial: 5.76 cents per kwh in 2006.
Recalling my eariler number [which btw were 2001 numbers]: "So just for residential: 1,140 billion kWh divide by 107 million equals 10,654 kwh per year per household."
So $.0973 times 10,654 kwh gives average $1036.63 cost per year per household.
Now if you live in Idaho the average residential cost is 6.13 cents per Kwh giving you an average of $653.09 cost per year per household. Whereas Massachusetts is 17.79 cents giving you an average of $1895.35 cost per year per household. Which is sort of like having gasoline costing $2 per gallon in one state and $6 per gallon in another state- and btw in some states industry can buy the gasoline for $1 per gallon.

If an average US household spending $1036.63 on electricity per year, that's equal to cost gasoline at $3 gallon in a car with 28 MPG of 9,675 miles [25.5 miles per day].