I don't know...

nbc4.com - News - Lawmakers Hold Hearing On 'Intersex Fish'

"Lawmakers on Capitol Hill want to know what is causing some male fish to acquire female sexual characteristics in the Potomac River and its tributaries."

...but I bet Mark Foley is involved somehow. Zing!

Anyway, what's interesting, to me anyway, is that they're only investigating this when it shows up in the Potomac. Male fish with female organs are an extremely common mutation and have been showing up everywhere for the last several years. But when they appear in Washington, it's cause for concern.

(Hat tip: Haggai.)