Obama has stated explicitly his intent is, if he wins, to raise taxes and "reform" immigration, which is code for amnesty, as reported here:
"If we won, then I believe that's a mandate for doing it in a balanced way."
"We can do some more cuts, we could look at how we deal with the health care costs in particular under Medicaid and Medicare in a serious way, but we are also going to need some revenue."
"If we get [the debt and deficit] done, then immigration reform, I think, is there to get done."
"And I think [the Republican Party] is going to need to get it done because you can't continue to alienate the fastest-growing segment of the country. And it's the right thing to do."
Of course, there are mandates and there are mandates. Obama likes mandates. He likes telling people how things will be, which is why we have ObamaCare shoved down our throats.
In 2008 Obama interpreted his victory as a mandate when his margin of victory in the formerly Red States which went for Bush was merely 1.4 million votes. He lost that "mandate" such as it was in 2010, and if the Republicans keep the US House in 2012 that will still be the conclusion whether or not Romney wins the presidency.