By Susan Glasser
The opinions expressed are her own.

The Amerislump is upon us.

Conservative agitator Pat Buchanan’s new book says America might not survive until 2025; it’s called “The Suicide of a Superpower.” Even less alarmist observers are suddenly sounding a lot like Buchanan, as economists now predict that China may surpass the United States as the world’s largest economy a lot sooner than we thought, and important conferences are convened to deal with what Fareed Zakaria memorably dubbed “the post-American world.”