And it's not what he would promote, it's what he wouldn't.
Obama wouldn't be trying to make marriage between a man and a woman. Obama wouldn't be trying to instigate a war with Iran. Ironically he did try to instigate a war in Syria but had Romney been in charge we'd be at war with Syria and Iran. Obama lied when he claimed he wouldn't be enforcing drug laws as harshly. Obama wouldn't be promoting legal avenues to make marriage between a man and a woman, which has neither a traditional or Constitutional basis.
And despite Obama being a Dem I think his spending is actually less than what it would be if Romney were in charge.