Charlie Cook, what's so smart about building a bi partisan opposition to Obama Care?

From Charlie Cook yesterday,

The key to victory was that Pelosi and Emanuel understood that their relatively new House majority is built on a layer of conservative-leaning districts won under perfect conditions in 2006 and 2008. And the two actively discourage members from some of those districts from voting in ways that would be construed as out of tune with their constituents. When the House passed Democrats' cap-and-trade energy legislation in June, for example, 44 Democrats joined 168 Republicans in voting no. Twenty-nine of those Democrats were from districts that President Obama failed to carry in 2008. Likewise, when the House approved Democrats' health care legislation, 39 Democrats, including 32 from districts that Obama lost, joined all but one Republican in voting no.

So what's so smart about building a bipartisan coalition against Obama and Pelosi care?