Conservative activists say GOP Congressional leaders are hiding behind Senate rules so they don’t have to fully repeal Obamacare, but they warn that passing an imperfect overhaul of the health care law will undermine basic free-market and states’ rights principles and anger voters who want to scrap the law entirely.

Opinions about the right process to pursue varies among Republican groups and lawmakers, with some pushing a harder repeal through the same budget reconciliation process that requires only a simple majority to pass the Senate, rather than the 60 votes normally needed for controversial measures.