C). http://business.timesonline.co.uk/tol/business/economics/article3221937.ece

excerpt:

Food price inflation is here to stay, warns chief of PepsiCo

D). http://www.cfr.org/publication/10722/brown.html
excerpt:
Well there is no easy solution, and that's perhaps the most important thing to notice. I think there is perhaps a hidden hope in some corners of the United States and in Israel that we can somehow undo these election results, maybe bring Fatah back to power. I think that that's a dream. If it did happen, the way that it would happen would be through violence and a military or security force coup, and that's a road that I think causes far deeper problems than solutions. So what we've got to do is I think realize that the Hamas government is probably here to stay, at least for four years, and to try and manage that situation by essentially trying to keep the Palestinian Authority alive and perhaps take what to me is remarkable in Arab politics, an embryonic two-party system emerging among Palestinians, and encourage that development.

How do I understand the meaning in C).

–“is here to stay” doesn’t seem to mean “be permanent and generally accepted”

As well as D).

–“Hamas government is probably here to stay, at least for four years”

doesn’t seem to mean “be permanent and generally accepted” too.

Thanks in advance.