If the election goes as the media says in their polls there will not be a requirement to reach over the aisle. The left radicals will have taken over and our nation will be gone had been a great time for us and the world but the following years will be back to dictatorships and burning of the Constitution.
In particular there is Obama's proclaimed intention of signing a "Freedom of Choice Act" making abortion on demand in all circumstances a basic right, sweeping away any victories the pro-life forces have won in the past few decades, including in the partial-birth-abortion area. There are enough liberal Republicans in the Senate who would refuse to support a filibuster if it came down to a few votes, and none of the supposedly pro-life Democrats in the Senate (Bob Casey, Jr., got elected on that pretense, and there may be others) will stand up to the party if their votes are needed.
The pro-life forces haven't really focussed attention on this freight train coming down the track if Obama is elected...a lot of nominally pro-life voters will probably vote for Obama because of his stand on the war, or because they are mad about the economy, without realizing how radical he will be on the abortion issue.