I'm not sure that Republicans will have any success at this:

With a big new majority in the House, Republicans will have little trouble passing whatever they want – including a full repeal of the health care reform law. But Republicans don't have a majority in the Senate, so even modest changes to the law will require the help of centrist Democrats – or at least scared ones.

Manchin is the Republicans' top target – because he campaigned against part of the law, and because he'll have to face the voters again in 2012 if he wants to serve a full term.

This is low-profile, but significant:

Unions are increasingly looking to the National Labor Relations Board to seek favorable workplace rulings, and the agency is showing a willingness to reopen matters previously decided in favor of employers. [...]