Keith Ellison is poor
Analyzing myriad disclosure forms--required from all members of Congress--the Center for Responsive Politics puts Ellison at 514th out of 538 U.S. Congress(wo)men in terms of personal wealth.
Pinning down a politician's net worth isn't an exact science, so the Center puts forth maximum and minimum estimates. His minimum net worth is negative $48,993, his max is plus $5,999. His average estimate is negative $21497. In other words, while there's a slight chance Ellison in the black, he's most likely slightly in the red.
Not that this should bother Ellison... at least not from a purely political standpoint. The DFLer has always strived to cultivate somewhat of a man-of-the-people vibe, and a modest net worth only bolsters a politician's populist bona fides.
In case you're curious, Al Franken is Minnesota's wealthiest congressman with an average estimated range of just over $6 million.
Hat tip: Polinaut