There's a lot of recycled concepts and themes in this film that have been taken from other, more (and less) notable disaster movies. The tension between the public right to know and the need to keep order; the noble sacrifice; the relationship with one's father; the estranged and slightly introverted hero; a dysfunctional family learning to love each other again; weak secondary love interest being killed off to pave the way for the hero's return to aforementioned family; and, of course, the obligatory pet dog that barely makes it to safety from impending doom. It's all there. Oh, and by the way, black presidents are passé now - we need an Latin dude in the office to make the ethnic minority Prez fashionable again.
Yet, as EA-1475 mentioned, most of this was done with greater style (if not substance) by Deep Impact - and that was despite valiantly shouldering the quite obvious handicap of having Tea Leoni in a lead role. John Cusack brought as much lulz as the special FX crew did... most noticeably in the incredibly camp limo chase scene. I couldn't figure out if Cusack's facial and verbal reactions were in response to the hypothetical disaster befalling the characters of the world around him, or the very real disaster of a limo chase scene that, in parts, seemed to resemble scenes from Team America. I actually rewound it and watched it twice just to confirm how stupidly funny it was.
But all good fun. What's not to like?