Politics is not only about policy, it is also about priorities. Legislative time is limited, and even where a President does have the votes in Congress to get his various proposals passed, he may be forced to choose which of his plans to focus on, and which to take up later, if at all.
Based on some selective convention watching over the past couple of days, it would seem that the main issues where Democrats would like to see an Obama administration take action are: 1) the Bush tax cuts; 2) climate change; and 3) health care. My guess is that many readers here at Vox Nova would likewise consider these to be important issues and would be pleased if a President Obama was able to enact his proposals on the subject.
My question is this: supposing that an Obama administration could only enact his proposals on one of these three issues, which one would it be and why? If was only able to enact two of the three, which would you have them be, and why?