That's Bill Clinton, criticizing Republicans, and — accidentally — describing what should happen in American democracy.
Take government down sounds destructive, but when you add except for what they like, the alarmism dissipates. Why shouldn't we always, in a democracy, be figuring out what we like and withdrawing our support for everything else? Otherwise, the idea would need to be that we must always retain everything that we already have, because we already have it. That seems to be a definition of conservativism.
In context, Clinton's remark is about how difficult it is for liberals who must add new things for government to do. That's hard, he's saying, when the conservatives are trying to subtract. Then the liberals have to expend effort trying to preserve all the things government has already gotten involved in, when it would be so much nicer to talk to people about the next thing government could do.