On one hand, Bush wasn't expected by as much as he did but still things more or less carried on. His major accomplishments being nudging SCOTUS ever so slightly to the right (thereby allowing for some Federal criminal restrictions on very late term abortions) and eliminating Bankruptcy for Middle Class and above debtors. His ultimate goals of confronting Iran, privatize Social Security, ending Medical Malpractice suits, restricting DNR orders, and making his medical research restrictions and tax cuts permeant.
I would expect a second term for another Republican to be similar but maybe the next Republican will finally able to overcome the institutions that have limited right-wingers in the past.
Similar, but I also think SCOTUS would declare Medicare, Medicaid, the entire 1964 Civil Rights Act, Social Security, and the 1935 National Labor Relations Act unconstitutional. The country would also definitely end up with a 9-0 conservative SCOTUS for eternity.