Overthrowing a Constitutional Republic is easy, doncha know? Just, flood the country with foreigners who have little or no understanding of our heritage, get them hooked on social services ASAP, give them the right to vote, then cater to the politics of envy, play the race card as often as possible, create major schisms that result in hateful enclaves and riotous civil unrest, then... Step in and "fix" the problem. See? It's easy.