My suggestions following the video of his speech.

"I have long supported a sharp reduction in payroll taxes with the difference made up in CO2 taxes. We should tax what we burn, not what we earn. This is the single most important policy change we can make."

Great Al!  I haven't heard of this before.  It's revenue neutral, budget balancing.  And the only way to raise taxes that is politically acceptable, by offsetting the raise with a payroll tax cut.  Brilliant politics! A tax break for struggling families. (text)

He mentioned geothermal, but didn't mention ground source (sometimes called geothermal heating/cooling) heat pump heating/cooling of buildings.  That's good for 36% of GHG elimination, with renewable electricity powering it.

Geothermal electric power is just too water intensive and eathquake prone to be practical.  Wind, solar, wave, ocean current power, and biogas/organic ag, that is enough power without geothermal.  And by harvesting coastal wind/wave power and using biogas for distributed grid backup,the huge grid upgrade isn't needed.

Present grid transmission capacity would be enough, but the grid would have to be transformed into a distributed smart grid.

He should add direct subsidies to the plan, 5 to 10 cents per kwh for renewable generation and conservation. The subsidies diverted from fossil fuel industries.

As far as letting nukes keep running?  Yes, until they can be phased out by renewables.  They would provide enough baseload power to transition to a grid that doesn't operate on the old 100% dispatchable central design.

And plugin electric cars, should have read, plugin hybrids.  And transitioning eventually to zero emission pure plugin electric cars as batteries get better over the next decade. 

Great inspiration though!  Go Al!  Just mind these changes.  Feel free to call me for more suggestions anytime, hehehey.  But seriously, thanks for your efforts!