Pretty Americentric line of thought considering us dirty gaters have international "membership", but this also applies to the West in general.
Call it China or the Globalists -- 'and' is probably more appropriate, but there's been a deliberate decades long attack on our educational institutions, our government, our economy, the Christian religion, our borders, Communist infiltration of key positions in government and industry, etc. etc. etc.
And it's been so effective, I just don't see a reversal of course. Even if the moderate collective pulled the wool from their eyes and took action, we're still due for an economic implosion as the debt bubble eventually pops, and we'd have to deal with the indoctrinated masses who would violently resist being jacked out of the Matrix.
Personally, by this point I'm not even thinking about saving the republic, but rather what actions will need to be taken to build something better from its ruins.
Not only do we need some level of sacrifice to obtain citizenship, but we also need greater disparity between the citizen and the noncitizen. It's not just citizenship as a birthright or prize of marriage that devalues it, it's also the lack of incentive. Noncitizens should not be able to own land or businesses, or benefit from social programs and citizen protections. As terrible as this comes off, maybe we should have had distinct rights for noncitizens that created greater desire to be a citizen.