Most rabbit holes look simple enough, but even a rabbit hole can be dangerous if unseen. A dog can break its leg in one. So can a horse or a human.
There's another kind of rabbit hole, the Washington kind. These are dug out not by furry rodents but by silky experts in the political shadows.
The Washington rabbit hole is full of half-truths, conspiracy theories, politics, spies and agenda-driven leaks in a town full of smiling liars. And from time to time Americans are invited, or goaded by media and political operatives, into entering one.
These are truly dangerous, because it is this kind of rabbit hole that an entire nation can step into, and when it does a country can break more than an ankle.
And it is in such a Washington rabbit hole that Susan Rice — the famed Benghazi liar and Barack Obama's former national security adviser — finds herself stuck.
There's little we can do about it. She's the one who got herself stuck in there. And she's the one who can dig herself out.
Rice might start digging out by testifying before Congress without Fifth Amendment protection to prove she's got nothing to hide.
In this smelly business that has occupied Americans for months, there are two issues for congressional investigators, and the nation, to consider.