That's a good question. There are some in the business community, particularly at the Chamber of Commerce, who have come to exactly this conclusion and have decided to play for all the stakes. Their hope is to knock the Democrats out of power in the congress and paralyze the Obama administration so that it can accomplish nothing, setting up for a Republican victory in 2012. The Chamber, along with the National Association of Manufacturers, has become an arm of the Republican Party for all intents and purposes.
On the other hand, most big business folks probably understand that this is a two-party system and they have tohave relationships in Washington that are robust enough to withstand all probable electoral outcomes, in which case making enemies of the administration that is in charge of the veto pen and the regulatory apparatus and the trade representative's office isn't a wise strategy.